3W (NDB7A75) High Power 445/450nm 3000mw Blue Laser Dot Module 12V w/ TTL 0-20kHz & Long Tme Working: Amazon.com: Industrial & Scientific
1000mw Industrial/Lab 850nm 1W Infrared IR Dot Laser Module 12V Burning Matches with TTL Fan Cooling & Long Time Working: Amazon.com: Industrial & Scientific
5A High Current NDB7A75 3.5-4.5W 445nm Blue Laser Driver 12V Step-Down Constant Current Drive Circuit w/TTL: Amazon.com: Industrial & Scientific
Amazon.com: CNCTOPBAOS 5.5W Laser Module,Focusable Engraving 450nm 5500mw Laser Head PWM TTL Blue Violet Light Adjustable Focus for CNC 3018 Pro Desktop Engraver Machine DIY Wood Paper Leather (5.5W) : Arts, Crafts
Amazon.com: (40) Laser Head, Blue Laser Module, Ultra-Fast Engraving of Stainless Steel and Oxidized Metal, high Transmittance, with PWM TTL