MPN: 96400031191. Compatible with Stihl MS200, MS200T, 020, 020T chain saws, replacing old parts. Please confirm that the model matches it before purchasing. Adopting wear-resistant and oil resistant rubber material to ensure excellent sealing performance and effectively prevent lubricating oil leakage problems. The size is 20x12x5mm, designed with precise dimensions that match the height of the original components. After installation, it can maintain stable and efficient operation of the engine. Before installation, it is necessary to clean the contact surface between the crankshaft and the housing, gently press it into place, ensure a tight seal, and avoid displacement and loosening. It is a commonly used maintenance and replacement part for chainsaws, which helps extend engine life and reduce the number of repairs caused by oil leakage., Manufacturer: OTOTEC