The STIHL SV11180343001 is an authentic OEM O-Ring designed for a broad range of STIHL power equipment, including various chainsaw, trimmer, and blower models. This essential sealing component is crucial for maintaining proper pressure and preventing leaks, contributing to the optimal function and longevity of your machinery. With an inner diameter of 3.5 mm and a thickness of 1.5 mm, this O-Ring provides a precise fit and dependable sealing capability.