Quarton Direct Green Laser Module VLM-520-51 LPT (Non-DPSS Green Dot Laser Module: Operating Temperature Range : -4 °F ~ 140 °F): Amazon.com: Industrial & Scientific
12V 532nm 50mw Green DPSS Laser Dot Module Fan Cooling TTL 0-30KHZ- DIY Lab High Quality - BeamQus
IADIY - Laser Module, Laser Diode Module, Line Laser Module
The Professor's Homebuilt Lasers Site - DPSS Lasers