4W Industry Laser 445nm/447nm/450nm 4000mW Blue Laser Dot Module Diode NDB7A75 w/ TTL0-20kHz & Fan Cooling & Long Time Working: Amazon.com: Industrial & Scientific
Focusable 4W 808nm 810nm Infrared IR Laser Diode Module Component for Laser Illumination Device + 12V Power Supply TTL: Amazon.com: Industrial & Scientific
976nm / 980nm to 1064nm Laser Diodes (ALL LEADING BRANDS)
4000mw 4w 450nm Focusable blue Laser Module diode laser cutting Engraving carving CNC Machine DIY with Analog signal|laser 4w|laser analogmachine diy - AliExpress
976nm / 980nm to 1064nm Laser Diodes (ALL LEADING BRANDS)