3.5W Industry Laser 445nm/447nm/450nm 3500mW Blue Laser Dot Module Diode NDB7A75 w/ TTL0-20kHz & Fan Cooling & Long Time Working: Amazon.com: Industrial & Scientific
Diode Laser Cutting Engraving | Cutting Laser Diode Module | Blue Laser Diode Cutting - Woodworking Machinery Parts - Aliexpress