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FB04-2300 2300mW 445nm Blue Laser Module 2*2.54-2P TTL/PWM Modulation DIY Engraver for EleksMaker - AliExpress
5.5W EleksMaker 405-445nm Blue Laser Module 2.54-3P TTL/PWM For DIY Laser Engraving Machine Wood Cutting Tool - AliExpress
3000mW 445nm Blue Laser Module Various Focus TTL/PWM Modulation w/ Heat Sink 2.54-3P DIY Laser Engraver for EleksMaker Sale - Banggood USA Mobile-arrival notice