The D34X5 Lens BesCutter Optical Protective is an essential component designed to safeguard the delicate internal optics of BOCI fiber laser cutting heads, specifically the BLT520H and BLT642H models. This high-power crystal lens, with its larger D34X5 dimensions, is engineered to withstand the rigors of demanding laser cutting operations, protecting against material splatter and contamination. Its dual-sided anti-reflective coating ensures optimal laser beam transmission, maximizing efficiency and preserving the lifespan of critical optical components.