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Description:-It can effectively block harmful gases and substances generated by engraving-Aluminum alloy material, strong and durable-Three sizes are available: 300x300x22mm, 200x200x22mm, 320x220x22mm Specification:Brand NameTWO TREESOriginCN(Origin)Item TypeHardware Parts/Machine PartsSize300x300x..

Feature：1. Designed for Laser Engraver machine, Laser Cutter, 3D printer, CNC millling, ect.2. 2 in 1 focus, adjustable lens and fixed focal length in one module.3. 7.5W Optical power output, Suitable for engraving and cutting.4. More Safety, Built-in protective glass to protect eyes! Even without w..