Features: 1. Made of high quality quartz material, sturdy and durable to use. 2. The protective window which will be used at laser cutting head to protect the focusing lens in case of damage. 3. Double-sided coating process, exquisite workmanship. 4. High accuracy machining, good product quality. 5. The protective lens made of quartz substrate can withstand high temperature and has high light transmittance, suitable for machines over 200W. Specification: Condition: 100% Brand New Item Type: Laser Protection Lens Material: Quartz Type: 22.35*4, 25.4*4, 35*4, 34*3, 30*5, 34*5, 28*4, 36*5, 35*5, 37*7, 25.4*5 (optional) Package List: 1 * Laser Protection Lens Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1Made of high quality quartz material, sturdy and durable to use. 2The protective window which will be used at laser cutting head to protect the focusing lens in case of damage. 3Double-sided coating process, exquisite workmanship. 4High accuracy machining, good product quality. 5The protective lens made of quartz substrate can withstand high temperature and has high light transmittance, suitable for machines over 200W.