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2W 450nm Blue Switchable TTL/Analogue Laser Module, Adjustable Focus 12V (CNC Engraving) - OdicForce
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15W 450nm Blue Laser Driver Board with TTL for DIY engraver module : High Power Burning Laser Pointers,DPSS Laser Diode LD Modules, Kinds of laser products
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TTL Laser Diode - 5mW 650nm Red - 50KHz Max : ID 1056 : $18.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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