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Long Optical Lens:Clear focus, Not stray light, Adjustable focal length.
Optical Design Specification:Wavelength: 405nm-450nm;Effctive Focal Lengh(EFL): 30mm - 50mm;Material: D-ZK3
Application Module: NEJE 20W 30W Laser Engraving Module;(not suitable for other brand Laser module)
Packge List:1 Optical Lens;(Please don't play for children under 3 years old.)
High-Quality Service: If you have any questions, please feel free to contact us.
NEJE Laser Module Head Focusing Lens Collimating Coated Replacement Glass Lens for 20W / 30W Laser Cutting Module