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Amazon.com: Oxlasers 405nm 500mW Purple Module 12V Focusable High Power Blue Violet UV Light for DIY Engraving with PWM : Electronics
Rough beam 532nm Green laser Continuously work laser 5V/12V/24V
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Laser Pointer Head 650nm Red 5MW Laser Modules DC 12V 3 6V Industrial Laser Tube With Adjustable Focal Length From Breadstorygroup168, $1.51 | DHgate.Com