Precision-Crafted Protective Windows for Fiber Laser Cutting, Welding, and Cleaning Heads Protect your investment and maintain beam integrity with Machinist’s Vault Fiber Laser Protective Windows — engineered for high-performance laser systems across cutting, welding, and cleaning applications. Built from premium Fused Silica, each circular window is AR coated for maximum transmission in the 900-1100nm range, ideal for fiber laser operations. ✅ Key Specifications: Material: Fused Silica Shape: Circular Roundness: ≤0.02mm Bevel Angle: 0.3-0.5mm Optical Finish: 40-20 AR Coating Range: 900-1100nm Transmittance: 99.98% Diameter Tolerance: -0.1mm Thickness Tolerance: ±0.1mm 🔧 Cutting head compatibility Find your window size below, then choose the power rating that matches your laser source. Window size (mm) Compatible cutting heads 21.5 x 2 Precitec LightCutter, ProCutter 1.0 · Bodor 22.35 x 4 Precitec HPSSL 24.4 x 2 Precitec ProCutter 2.0, ProCutter ZOOM · Bodor 24.9 x 1.5 Raytools BM110, BM111, BM06K, BS06K, BS12K, BS20K, BS30K, BS40K (incl. 3D) · Bodor 27.9 x 4.1 Raytools BM110, BM111, BM110-3D, BM111-3D, BD04K-3D · Bodor 30 x 5 Precitec LightCutter · Trumpf · Bodor 34 x 5 Trumpf 37 x 7 Precitec ProCutter 1.0, ProCutter 2.0, ProCutter ZOOM · Raytools BM06K, BS06K, BS12K, BS20K, BS30K, BS40K (incl. 3D) · Bodor 38.1 x 1.6 Bodor Higher power ratings fit progressively more head models. Additional sizes (25.4 x 4, 38.1 x 6.35, 42 x 9, 46 x 10, 50 x 8, 55 x 9) are stocked for other OEM heads. Not sure which window your machine takes? Send us your cutting head model and we’ll confirm the correct size and power before you order.