Protective Windows Lens Pack For Fiber Laser Cutting Heads 0-4KW 27.9x4.1mm 37x7mm 30x5mm 30x1.5mm 18x2mm 10 Pieces Compatible With BT210S BT240S BM109 BM111 BM114S

10 Pack Protective Lenses for 0-4KW Fiber Laser Heads
✔️ 10 pieces in sizes 18x2mm 27.9x4.1mm 30x5mm 37x7mm for multiple heads

This pack gives you replacement windows that protect the optics inside fiber laser cutting heads during daily metal cutting work.

✅ Fits models BT210S BT240S BM109 BM111 BM114S
✅ Handles power levels from 0 to 4KW without overheating
✅ Comes with ten windows covering common diameters and thicknesses
✅ Keeps dust and debris off the main lens in the cutting head

💡 What is the role of protective windows in fiber laser systems? Protective windows act as the first barrier that keeps spatter and smoke away from expensive internal optics. - They slide into the head nozzle area and take the brunt of the cutting process - Users swap them out fast when the surface gets clouded to keep cuts clean - Different thickness options match the power range and beam focus needs - Keeping spares on hand reduces downtime during long production runs

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