vi Series 30 & 40 Watt CO2 Laser - Novanta Photonics
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Amazon.com: LASER TREE 40W(5W Output Optical Power) Laser Engraving Module, 450nm Laser Head for CNC Laser Engraver/Laser Cutter Machine, DIY Laser Engraving Tool Suitable for Wood Metal Acrylic Paper Etc
Spirit LS 40 Watt Laser – Learning Labs, Inc.
Laser engraver 40 W 300 x 200 mm
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K40 eBay Chinese CO2 Laser Cutter & Engraver - UnBoxing New 40 Watt Unit! - YouTube
40 W Laser Engraver Kits for 3D Printer/CNC Machine Laser Engraving/Cu – Sovol3d