... . 4. Certify to ISO9001:2008, ROHS, ect. Description of Good Quality Car Rear Wheel Hub Oil Seal for Aging Resistant:1. Materials: can be NR ... , ECO, CSM, VITON, FKM, FPM, etc. 2. Characteristics: good physical and chemical properties wheel hub oil seal. 3. Hardness: 30~90 shore A ...