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Atomstack has combined four 5W Lasers to one 20W diode laser. Aperently it can even cut 0.5mm metal. : r/lasercutting
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Amazon.com: Laser Engraver Module, LASER TREE 20W Laser Engraving Cutting Module CNC, 4W Optical Output Power, Adjustable Focal, 450nm Laser Head for Laser Engraver Cutter Machine DIY Engrave Wood Paper Leather
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Amazon.com: Laser Module, LASER TREE 20W Optical Power Laser Engraving Module with Air Assist, Quad-Compression Spot, 80W Laser Head for Laser Engraver laser Cutter, DIY Engraving Wood & Metal, Better for Cutting
20 watt (20000 mw) diode laser add-on for 3D printer / CNC| engraver & cutter laser module – Endurance Lasers
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Amazon.com: Laser Engraver Module, LASER TREE 20W Laser Engraving Cutting Module CNC, 4W Optical Output Power, Adjustable Focal, 450nm Laser Head for Laser Engraver Cutter Machine DIY Engrave Wood Paper Leather
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xTool D1 Pro 20W (Grey); Higher Accuracy Diode DIY Laser Engraving & Cutting Machine-Metal - Micro Center
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