# ComMarker B4 20W Review (2026): Pros, Cons & Price > ComMarker B4 20W review: 20 W fiber laser, galvo (portable), 200 × 200 mm. Specs, materials, pros, cons and our 7.2/10 verdict. - Source: https://laserengraversguide.com/laser-engravers/commarker-b4-20w/ - Markdown version: https://laserengraversguide.com/laser-engravers/commarker-b4-20w.md - Last updated: 2026-10-30 --- - [Home](https://laserengraversguide.com/) - [Compare lasers](https://laserengraversguide.com/laser-engravers/) - ComMarker B4 20W Fiber Laser 7.2 ![ComMarker B4 20W Fiber Laser](https://laserengraversguide.com/_astro/commarker-b4-20w.ZxGBRmzw_AoWBq.webp) ComMarker · Mid-range # ComMarker B4 20W Fiber Laser Review Engravers who mainly mark metal (tumblers, tags, jewelry, tools, knives) and want a real fiber source for the least money. - 20 W fiber - Galvo (portable) - 200 × 200 mm - Open-beam galvo (Amazon lists 'Class 1'; see notes) - Deep-engraves metal $$$$ Mid-range Price tier: Mid-range price tier · see Amazon for today's price [Check price on Amazon](https://www.amazon.com/dp/B0BW8HWRBX?tag=laserengraversguide.com-20)[See alternatives](#alternatives) Opens Amazon in a new tab. By [Laser Engravers Guide Editorial Team](https://laserengraversguide.com/about/) · Updated October 30, 2026 · [How we score](https://laserengraversguide.com/how-we-research/) Our score comes from manufacturer specs, professional reviews, and owner reports. It is not a hands-on lab test. ## The verdict If metal is the job, a fiber laser beats any diode, and the B4 20W is the most affordable established one here: TechRadar praised its precision and speed, it comes with two lenses, and it runs LightBurn. It's also a bare industrial tool with an open beam, manual focus and no use on unpainted wood. Want wood and metal in one enclosed, camera-guided box? Look at the xTool F1 Ultra. Want color marking on stainless? Step up to a MOPA such as the xTool F2 Ultra. ### What we like - True 1064 nm fiber marks and engraves bare stainless, aluminum, brass, gold and silver at up to 15,000 mm/s - Two field lenses (110 mm and 200 mm), a foot switch and 1064 nm goggles in the box - Works with LightBurn and ships with EZCAD2; optional D69/D80 rotaries - TechRadar called it precise, fast and an ideal option for small businesses ### Watch out for - Fiber won't cut wood, and wood must be painted before it will engrave - Open beam with no enclosure: 1064 nm OD5+ glasses for everyone nearby, or ComMarker's enclosure - Manual focus with red-dot pointers; EZCAD is clunky and LightBurn needs a paid galvo license - ComMarker's store lists the B4 as 'Clearance' in favor of the newer B6 ## Score breakdown Engraving & cutting 8.2 Ease of use 6.4 Safety & build 5.8 Value 7.8 20 W fiber (output); 30 W, 50 W and 100 W versions sold separately · Galvo (portable) · Open-beam galvo (Amazon lists 'Class 1'; see notes) ## ComMarker B4 20W specs | Brand | ComMarker | | --- | --- | | Laser type | Fiber (1064 nm fiber (Q-switched)) | | Output power | 20 W fiber (output); 30 W, 50 W and 100 W versions sold separately | | Format | Galvo (portable) | | Work area | 200 × 200 mm (7.9 × 7.9 in). Two field lenses included: 110 × 110 mm for fine detail and 200 × 200 mm; electric lift column | | Max speed | 15,000 mm/s (maker rating) | | Laser class | Open-beam galvo (Amazon lists 'Class 1'; see notes) | | Cuts wood | Not designed for cutting | | Clear acrylic | No | | Metal | Deep-engraves metal | | Air assist | Not available | | Camera | No | | Autofocus | No | | Rotary | Optional add-on | | Software | EZCAD2 (included), LightBurn (galvo license sold separately) | | Connectivity | USB | | Weight | 24.3 lb | | Warranty | Not stated on the listing — confirm before buying | | Price tier | $$ Mid-range ($500–$1,500). See Amazon for today's price. | - Amazon's spec table lists the 20 W source as 'Max' (Max Photonics) and the 30/50/60 W sources as Raycus. The 20 W is a standard Q-switched source, not MOPA, so no color marking. - The listing's 'CLASS 1 LASER PRODUCT and power output 1.95mW' line doesn't match an open-beam galvo marker. Treat it as Class 4 in practice and use the supplied 1064 nm goggles. - Engraving depth quoted on the listing is 0.3–0.5 mm; TechRadar cites 0.3 mm. Deep relief work is possible but slow at 20 W. - ComMarker's Feb 2026 buying guide marks the B4 as clearance and points buyers to the B6; check stock before featuring it. - TechRadar saw $1,719 on Amazon in 2024; Amazon showed $1,399 on Oct 29, 2026. ### Bundles and power options Each option is a separate Amazon listing. Prices are typical street prices, not live. | Option | What's different | Price | | --- | --- | --- | | B4 20W | Our pick: two lenses, foot switch, 1064 nm goggles | [Check price](https://www.amazon.com/dp/B0BW8HWRBX?tag=laserengraversguide.com-20) | | B4 30W + rotary | More power plus a rotary chuck | [Check price](https://www.amazon.com/dp/B0BW8LK895?tag=laserengraversguide.com-20) | | B4 50W | Faster deep engraving and thin-metal cutting | [Check price](https://www.amazon.com/dp/B0BW8HMPR7?tag=laserengraversguide.com-20) | Specs are compiled from manufacturer listings and independent reviews and may change between production runs. Laser makers re-bundle often, so confirm what's in the box on the Amazon page before buying. The ComMarker B4 20W is a desktop fiber laser marker: a 1064 nm Q-switched fiber source whose beam is steered by galvo mirrors across a 110 mm or 200 mm-square field. It does one job, metal, and does it far better than any blue diode can. It costs about $1,400–1,700 on Amazon (Amazon showed $1,399 on October 29, 2026; TechRadar saw $1,719 in 2024), so check today’s price. It’s our budget pick for metal engraving. One caveat up front: ComMarker’s store now lists the B4 as clearance in favor of the B6. To see which metals fiber handles and which it doesn’t, try the [material checker](https://laserengraversguide.com/tools/material-checker/?material=bare-metal). ## Who the B4 is for (and who should skip it) It’s for engravers whose products are mostly metal: stainless tumblers and bottles, dog tags, jewelry, knives, tools, keychains and anodized business cards. TechRadar called it precise and fast, and an ideal option for small businesses. If you price per piece, the [profit calculator](https://laserengraversguide.com/tools/profit-calculator/) will show how quickly a metal-only machine can pay for itself at your volumes. Skip it if you work mainly in wood, leather or acrylic. Fiber won’t cut wood, and wood must be painted before it will take a mark. Skip it if you want camera placement and autofocus, too: focus is manual using red-dot pointers. And if you want color marks on stainless, you need a MOPA source like the one in the [xTool F2 Ultra](https://laserengraversguide.com/laser-engravers/xtool-f2-ultra/). The B4’s 20 W source is standard Q-switched, so color marking isn’t on the table. ## What a 20 W fiber does well Bare metal is where a fiber laser beats a diode. The B4 marks and engraves bare stainless, aluminum, brass, gold and silver at speeds up to 15,000 mm/s, with no coating or marking spray. Blue-diode machines that claim to “engrave stainless” leave a slow, low-contrast oxide mark; a fiber gives you a crisp result in seconds. Depth is the limit at this power. The listing quotes 0.3–0.5 mm, and TechRadar cites 0.3 mm. Deep relief work is possible but slow at 20 W. If deep engraving or thin-metal cutting is the business, the [B4 50W](https://www.amazon.com/dp/B0BW8HMPR7?tag=laserengraversguide.com-20) (about $2,399) is ComMarker’s faster option, and the [30 W + rotary bundle](https://www.amazon.com/dp/B0BW8LK895?tag=laserengraversguide.com-20) (about $1,599) adds power and a rotary chuck. Two field lenses come in the box: 110 × 110 mm for fine detail and 200 × 200 mm for larger items. An electric lift column sets the working height. For software you get EZCAD2, which works but feels dated. LightBurn makes the experience much friendlier once you pay for its galvo license. ## What you’ll need beyond the box - **1064 nm eye protection for everyone in the room.** The listing’s “Class 1, 1.95 mW” line doesn’t describe an open-beam galvo marker. The FDA’s [laser hazard classes](https://www.fda.gov/radiation-emitting-products/home-business-and-entertainment-products/laser-products-and-instruments) describe Class IV as an immediate eye and skin hazard from the direct or reflected beam, and shiny metal reflects. A pair of 1064 nm goggles comes in the box; buy extra pairs, such as the [Cloudray 1064 nm goggles](https://www.amazon.com/dp/B078J3JS39?tag=laserengraversguide.com-20), for anyone else nearby, or add ComMarker’s enclosure. Blue-diode glasses do nothing against this beam. - **Fume extraction.** There’s no air assist and no enclosure, so smoke from coatings and anodizing rises straight off the part. ComMarker sells its own fume extractor, or you can set up an extractor intake close to the field and vent it outside. Our [ventilation guide](https://laserengraversguide.com/posts/laser-engraver-ventilation-guide/) explains the options. - **A rotary for tumblers.** ComMarker’s optional D69/D80 rotaries handle cylinders. [Powder-coated tumblers](https://www.amazon.com/dp/B0DPQ3XBJZ?tag=laserengraversguide.com-20) and [anodized aluminum cards](https://www.amazon.com/dp/B08JM4YJ13?tag=laserengraversguide.com-20) make cheap test pieces. - **A fire extinguisher and a clear bench.** Coatings can flare. Keep an ABC extinguisher nearby and never leave the machine running unattended. See the [accessories page](https://laserengraversguide.com/accessories/) for more. ## Reliability and warranty ComMarker says all its products are covered by a warranty service, but our data doesn’t confirm the B4’s term, so read the warranty on the listing you buy from. The clearance status matters more than the warranty term. ComMarker’s February 2026 buying guide steers buyers to the B6, so ask about parts and support before you buy, especially if you’re paying close to the old $1,719 price. On the plus side, the B4 is an established design that TechRadar reviewed favorably, with LightBurn support that keeps it usable beyond ComMarker’s own software. ## Bottom line If metal is the job, a fiber beats any diode, and at about $1,400 the B4 20W is the cheapest established fiber we track: two lenses, goggles and a foot switch in the box, plus LightBurn support. It’s also a bare industrial tool with an open beam, manual focus and no use on unpainted wood. Want wood and metal in one enclosed, camera-guided box? Buy the [xTool F1 Ultra](https://laserengraversguide.com/laser-engravers/xtool-f1-ultra/). Only marking metal occasionally alongside diode work? The portable [xTool F2](https://laserengraversguide.com/laser-engravers/xtool-f2/) may be enough. Our [best laser engraver for metal](https://laserengraversguide.com/posts/best-laser-engraver-for-metal/) guide compares all three. Ready to buy? · 7.2/10 ComMarker B4 20W Fiber Laser $$$$ Mid-range Price tier: Mid-range · 20 W fiber · Galvo (portable) [Check price on Amazon](https://www.amazon.com/dp/B0BW8HWRBX?tag=laserengraversguide.com-20) ## Accessories for the ComMarker B4 20W Official and universal add-ons sold on Amazon — safety glasses, fume extraction, air assist, rotaries and materials. Check the listing confirms your exact model before you buy. - Safety**CARLANY 190–490 nm OD6+ laser safety glasses**Universal fitBlue-diode protection for anyone near an open-frame laser, or when you lift the lid or override an interlock on an enclosed one. Covers 445–455 nm blue diodes only; does not protect against 1064 nm IR/fiber or 10.6 µm CO2. Match the OD rating to your laser's wavelength.[Check price](https://www.amazon.com/dp/B08R4PMCHR?tag=laserengraversguide.com-20) - Safety**Cloudray 1064 nm laser safety goggles**Compatible, third-partyThe invisible 1064 nm beam of fiber and IR lasers needs its own eyewear; blue-diode glasses won't stop it. For 1064 nm sources only. Dual-laser machines need protection for both wavelengths; check the OD rating on the listing.[Check price](https://www.amazon.com/dp/B078J3JS39?tag=laserengraversguide.com-20) - Safety**Amerex B417T 2.5 lb ABC fire extinguisher with bracket**Universal fitLasers cut by burning; a small ABC extinguisher mounted beside the machine is the cheapest fire insurance you can buy. Dry-chemical powder can ruin a laser's optics and electronics; LightBurn recommends a CO2 extinguisher for the machine itself.[Check price](https://www.amazon.com/dp/B084P5PPNC?tag=laserengraversguide.com-20) - Safety**Amerex 322 5 lb carbon dioxide (CO2) fire extinguisher**Universal fitClass B:C CO2 leaves no powder residue, so it puts out a fire in the machine without destroying the optics. Pricier than ABC; not rated for Class A (wood/paper) fires on its own, so keep a fire blanket too.[Check price](https://www.amazon.com/dp/B00F5CJHFW?tag=laserengraversguide.com-20) - Safety**Prepared Hero emergency fire blanket, 39 × 39 in (2-pack)**Universal fitSmothers a flare-up on the bed without coating the machine's optics in extinguisher powder.[Check price](https://www.amazon.com/dp/B08TYT543Y?tag=laserengraversguide.com-20) - Fumes & enclosure**AC Infinity Cloudline S4 4-inch inline duct fan with speed controller**Universal fitBoosts a laser's built-in exhaust over long duct runs so smoke actually leaves the room. Check your machine's exhaust port diameter; adapters may be needed.[Check price](https://www.amazon.com/dp/B07JB292JC?tag=laserengraversguide.com-20) - Fumes & enclosure**VIVOSUN 4-inch aluminum ducting, 25 ft with clamps**Universal fitReplaces short stock hoses so you can reach a window or wall vent; foil duct tolerates hot exhaust better than vinyl.[Check price](https://www.amazon.com/dp/B01EUURUVM?tag=laserengraversguide.com-20) - Materials**3 mm basswood plywood sheets, 12 × 12 in (12-pack)**Universal fitThe default test and project stock for every laser here; 12 × 12 in fits all but the smallest beds. Cut down for the 150 mm A1C or galvo machines.[Check price](https://www.amazon.com/dp/B0DRG9L2TD?tag=laserengraversguide.com-20) - Materials**VIBRATITE 4-inch square black slate coasters (60-pack)**Universal fitBest-selling laser blank: slate engraves light grey on black with any diode, CO2 or IR source.[Check price](https://www.amazon.com/dp/B0CDWL9YPH?tag=laserengraversguide.com-20) - Materials**Laserable leatherette hat patches with adhesive, 3 × 2 in (50-pack)**Universal fitCheap, fast-selling patch blanks that engrave cleanly with diode and CO2 lasers. Not for fiber-only lasers such as the ComMarker B4.[Check price](https://www.amazon.com/dp/B0BFDQZKPZ?tag=laserengraversguide.com-20) Compatibility checked October 2026. More in our [laser engraver accessories guide](https://laserengraversguide.com/accessories/). ## Featured in our guides - [The Best Laser Engraver for Metal in 2026: Fiber, IR and Diode Options](https://laserengraversguide.com/posts/best-laser-engraver-for-metal/) - [The Best Laser Engraver for Tumblers in 2026: Rotary-Ready Picks](https://laserengraversguide.com/posts/best-laser-engraver-for-tumblers/) - [Best Portable Laser Engraver: 7 Galvo and Compact Picks for 2026](https://laserengraversguide.com/posts/best-portable-laser-engravers/) - [Diode vs CO2 vs Fiber Laser: Which Type Do You Actually Need?](https://laserengraversguide.com/posts/diode-vs-co2-vs-fiber-laser/) ## ComMarker B4 20W FAQ ### Can the ComMarker B4 engrave or cut wood? It can't cut wood at all, and it will only engrave wood that has been painted first. A 1064 nm fiber laser is a metal tool. If you want wood and metal in one machine, look at a dual-source laser such as the xTool F1 Ultra. ### Is the ComMarker B4 really a Class 1 laser? The Amazon listing says 'Class 1', but that doesn't match the machine: the B4 is an open-beam galvo marker with no enclosure. Treat it as Class 4 in practice. Everyone nearby needs 1064 nm-rated glasses, or you need ComMarker's enclosure. ### Does the B4 work with LightBurn? Yes, but LightBurn needs its separately sold galvo license. The B4 ships with EZCAD2, which works but is clunky next to LightBurn. ### Is the ComMarker B4 discontinued? ComMarker's store lists the B4 as clearance and points buyers to the newer B6. Amazon still had the 20 W version in stock on October 29, 2026, so check availability and price before you order. ## Sources - [amazon.com](https://www.amazon.com/dp/B0BW8HWRBX?tag=laserengraversguide.com-20) - [store.commarker.com](https://store.commarker.com/products/b4-fiber-laser-engraver) - [techradar.com](https://www.techradar.com/pro/commarker-b4-laser-engraver-review) Not sold yet? ## Alternatives to the ComMarker B4 20W ![xTool F2 Portable Dual Laser](https://laserengraversguide.com/_astro/xtool-f2.CKt7NejJ_hguby.webp) ### [xTool F2 Portable Dual Laser](https://laserengraversguide.com/laser-engravers/xtool-f2/) 8.1 - 15 W dual laser - Galvo (portable) - 115 × 115 mm - Bare metal Craft-fair and pop-up sellers who personalize small items on the spot (metal tags, tumblers, phone cases, leather) and need to carry the laser. $$$$ Mid-range Price tier: Mid-range base bundle on Amazon [Check price on Amazon](https://www.amazon.com/dp/B0G1LDYYC3?tag=laserengraversguide.com-20)[Read the full review](https://laserengraversguide.com/laser-engravers/xtool-f2/) ![xTool F1 Ultra 20W Fiber & Diode](https://laserengraversguide.com/_astro/xtool-f1-ultra.DRpPMPlL_Z1Q2M2X.webp) ### [xTool F1 Ultra 20W Fiber & Diode](https://laserengraversguide.com/laser-engravers/xtool-f1-ultra/) 8.2 - 20 W dual laser - Galvo (portable) - 220 × 220 mm - Bare metal Small businesses that personalize both metal and wood or leather goods and want fast, camera-aligned batch work in one enclosed box. $$$$ Premium Price tier: Premium today's price on Amazon [Check price on Amazon](https://www.amazon.com/dp/B0D9Q787GN?tag=laserengraversguide.com-20)[Read the full review](https://laserengraversguide.com/laser-engravers/xtool-f1-ultra/) ![LaserPecker LP5 20W Fiber & Diode](https://laserengraversguide.com/_astro/laserpecker-lp5.BTOKQHf7_ZsFNUe.webp) ### [LaserPecker LP5 20W Fiber & Diode](https://laserengraversguide.com/laser-engravers/laserpecker-lp5/) 7.2 - 20 W dual laser - Galvo (portable) - 160 × 120 mm - Bare metal Mobile engravers who need fiber-plus-diode capability in the lightest package and will add the enclosure for indoor or retail use. $$$$ Premium Price tier: Premium base bundle on Amazon [Check price on Amazon](https://www.amazon.com/dp/B0DK1HVN69?tag=laserengraversguide.com-20)[Read the full review](https://laserengraversguide.com/laser-engravers/laserpecker-lp5/) [Compare all 16 lasers →](https://laserengraversguide.com/laser-engravers/) ## Helpful guides [Top picks ### The 7 Best Laser Engravers of 2026: Ranked for Home, Craft and Small Business The best laser engravers of 2026, ranked: xTool P2S, xTool M2, Creality Falcon A1 Pro, xTool F2 and more, with honest wattage, laser class and price notes. Updated Oct 30, 2026](https://laserengraversguide.com/posts/best-laser-engravers-2026/)[Beginners ### The Best Laser Engraver for Beginners in 2026: 5 Safe, Easy Picks The best laser engravers for beginners: enclosed Class 1 machines with cameras and simple software, from the xTool M2 to the Falcon A1C, plus what to skip. Updated Oct 30, 2026](https://laserengraversguide.com/posts/best-laser-engraver-for-beginners/)[Budget ### The Best Budget Laser Engravers Under $500 in 2026 (and the Safety Trade-Offs) The best laser engravers under about $500: the enclosed Falcon A1C and xTool M2 vs open-frame power like the Atomstack A20 Pro V2, with the real total cost. Updated Oct 30, 2026](https://laserengraversguide.com/posts/best-budget-laser-engravers/) ComMarker B4 20W $$$$ Mid-range Price tier: Mid-range [Check price](https://www.amazon.com/dp/B0BW8HWRBX?tag=laserengraversguide.com-20)