5.6mm Violet Blue Diode Lasers 405nm 700mw TO-18 Laser Diode for Laser Module: Amazon.com: Industrial & Scientific
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
Original SLD3237VFR 405nm 3.8mm Violet/Blue Laser Diode CW 150 Max 350: Amazon.com: Industrial & Scientific
1.5W Adjusted Blue Laser 445nm/447nm/450nm 1500mW Diode Laser Dot Module 12V TTL & Fan Cooling: Amazon.com: Industrial & Scientific