Fb03 2500mw 445nm 12v Blue Laser Module 2.54-3p Ttl/pwm Modulation For Laser Engraver Can Control Laser Power Focusable Gktools - Woodworking Machinery Parts - AliExpress
Nktronics 2.5W 2500MW laser module Blu ray 12V 450nm With TTL Driver For DIY CNC Engrave Machine : Amazon.in: Industrial & Scientific
Laser head 2.5w/3500mw/5500mw/7w 405nm 12V Blue Laser For DIY CNC Lase – Chinacnczone