Designed with a multi-lip external thread structure for straightforward installation and enhanced sealing reliability in demanding applications. Size: 20x35x6mm, 20mm ID, 35mm OD, 6mm thickness ; Provides effective protection against leakage of lubricants and ingress of contaminants in a wide range of mechanical and automotive systems. Constructed from NBR (Nitrile Rubber) with a 70A Shore hardness, balancing flexibility with durability for effective sealing performance. Widely used in bearing parts of industry, automobiles, ships, motorcycles, such as crankshafts, camshafts, differentials, shock absorber, engines, axles, front and rear wheels, or other objects that require bearing seals, Manufacturer: HKSDKABOP