High Power 532nm 100mW Green Diode Laser Dot Module w/Cable 12x60mm: Amazon.com: Industrial & Scientific
Laser Red Dot 5mW Module - ProtoSupplies
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