Winderosa 501305 Engine Oil Seal 30 X 72 X 10 High quality oil seals designed for the needs of todays high RPM engines High chromium content stainless steel alloy spring for maximum performance and corrosion resistance A must to replace when your engine is apart Fits Hirth, Kohler, Rupp, tohatsu, Ski-Doo wtih Crankshaft oil seals, Shaft Dia. 30mm. x Seal Dia. 72mm. x Seal Width 10mm.