The optical path is critical to any modern fibre laser — and it's only as good as the glass in it. Our lower protection windows use the highest-purity JGS1 fused silica with premium AR coating to maximise consumable life and keep your system safe, from 6 kW right up to 30 kW. Specifications Material JGS1 high-purity fused silica Coating Anti-reflective + anti-scratch Power range 6 kW – 30 kW Key Features ✓ High-purity, non-crystalline fused silica for superb optics ✓ Anti-reflection and anti-scratch coatings ✓ Exceptionally low refractive-index variation and birefringence ✓ High transmittance through UV and infrared ✓ Irradiation-resistant and stable in harsh conditions Compatibility: Precitec, Han's, WSX, Klinge, Ospri and Raytools Every unit is inspected and quality-assured prior to shipment. Industrial Price Guarantee: Found a lower quote? We'll match it and take an extra 5% off. Free standard shipping on small-parts & consumables orders over $200 (bulky items quoted separately). 10% off your first consumables order with email sign-up.