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Amazon.com: (40) Laser Head, Blue Laser Module, Ultra-Fast Engraving of Stainless Steel and Oxidized Metal, high Transmittance, with PWM TTL
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Industrial Blue Lasers 445nm 447nm 450nm 50mw Dot Diode Module w/Driver Out and TTL & Fan Cooling: Amazon.com: Industrial & Scientific
Industrial Blue Lasers 445nm 447nm 450nm 50mw Dot Diode Module w/Driver Out and TTL & Fan Cooling: Amazon.com: Industrial & Scientific
