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Amazon.com: AENBUSLM 40W (5W Output Optical Power) Laser Engraving Module, 450nm Laser Head for CNC Laser Cutter Machine, Ultra Fine Air Assist DIY Laser Engraving Tool Suitable for Wood Metal Acrylic Paper
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Amazon.com: LASER TREE 40W Laser Module, 5W Optical Output Power Laser Cutter Module w/Metal Air Assist, Compatible with Laser Engraver Laser Cutter Machines CNC, 45mm Fixed Focus 12V
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Amazon.com: SCULPFUN Laser Modules for S9 Laser Engraver, 90W Laser Head Replacement for S9 Laser Cutting Machine, 5.5-6W Diode Spot Compression Laser, Cutter Accessories (Laser Head for S9 Engraver)
Amazon.com: LASER TREE 20W Optical Power Laser Module for Laser Engraver Cutter, 80W Laser Engraver Module with Air Assistance, High Accuracy Quad-Compression Spot Laser Head, Engraving 340+ Colors On Metal Steel