650nm 1mW~20mW Red laser module/ DC 12V~24V /Focus Adjustable
Laser Pointer Head 650nm Red 5MW Laser Modules DC 12V 3 6V Industrial Laser Tube With Adjustable Focal Length From Breadstorygroup168, $1.51 | DHgate.Com
1W 520nm 1000mw Grass Green Diode Laser Dot Module 12V TTL w/Fan Cooling - Long Time Working: Amazon.com: Industrial & Scientific
5-12V 532nm 100mW Industrial Green Laser Line Module for Stone/Wood Cut Locating | eBay
High Power 450nm Blue Burning Laser Pointer SOS Visible Beam Dot Light | eBay