The 11021M2110051 is an OEM original, high-performance top inner pressure end-face seal ring engineered specifically for professional RayTools fiber laser cutting and welding heads. Featuring precision-machined factory dimensions of 29.2mm (Outer Diameter) x 21mm (Inner Diameter) x 3.55mm (Thickness), this component is purpose-built to fit seamlessly inside the upper protective lens compartment. Its critical function is to provide an absolute airtight barrier around top protective windows (specifically D24.9mm x 1.5mm optics), preventing high-pressure assist gases and fine metallic debris from contaminating the sensitive collimator chamber.

Manufactured from a high-grade premium PTFE (Teflon) substrate and reinforced with an integrated stainless steel internal core, the 11021M2110051 seal ring delivers outstanding mechanical toughness, excellent fatigue life, and a minimal friction coefficient. This professional B2B-grade compound maintains structural elasticity under continuous pressure fluctuations and intense thermal gradients, eliminating gas bypass to protect underlying optical elements from overheating and premature wear.