Features: 1. Made of quartz material, sturdy and durable. 2. Protective window for the laser cutting head to protect the focusing lens from damage. 3. Double-sided coating process with exquisite workmanship. 4. High-accuracy machining, resulting in good product quality. 5. The protective lens, made of a quartz substrate, can withstand high temperatures and has high light transmittance, suitable for machines over 200W. Specification: * Condition: * 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 for a slight error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated the same; the item color displayed in photos may slightly differ from the real object. Please consider the real one as the standard.