... Certify to ISO9001:2008, ROHS, ect. Description of Good Quality Car Rear Wheel Hub Oil Seal for Aging Resistant:1 ... CR, SBR, SI, BR, IR, EPDM, IIR, PU,E/A, ECO, CSM, VITON, FKM, FPM, etc. 2. Characteristics: good ... oil seal. 3. Hardness: 30~90 shore A or IRHD as your request, tolerance is ± 5 ... shore A, and can be ±3 shore A for special products. 4. Size tolerance: ...