FKS400W sealing ring (2 pcs.) is a spare part designed for FKS 400 TWIST chucks and other devices of the PP FKS 400 series. It ensures the tightness of the system, preventing shielding gas leakage during welding. The set includes two rings, made of heat-resistant materials for durability. Their easy replacement increases work efficiency, and their precise fit with FKS 400 equipment ensures reliability. The rings are ideal for use in the welding industry, improving weld quality and work safety.