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Amazon.com: LUNYEE 40W Laser Module, 5.5W Optical Output Power Compressed Spot Laser Engraving Module with Air Assist Nozzle, 450nm Laser Head Compatible with CNC Laser Engraver/Laser Cutter Machine
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Amazon.com: Class Ⅱ Highly Stable 532nm 0.4mw Green Spot Laser Module 8mm Diameter Green Point Laser Head : Industrial & Scientific
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