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
Economical Green Laser Module - Quarton
Professional Red laser module/laser Dot/ 24 hours continue work/ 650nm 5mw~200mw / Collimation Lasers / Focus adjustable