13x42mm Focusable 20mw 405nm Violet/Blue Adjustable Laser Module

3-5.5VDC 20mW 405nm Violet/Purple Laser Module 13x42mm. 1 x 3-5.5VDC 20mW 405nm Violet/Purple Laser Module 13x42mm. Be sure the operator has experience in optics DIY or testing. Laser Shape Line/Dot/Cross.

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