... , ozone resistant, weather proof, UV radiation resistant, etc. o ring.3. Hardness: 20-90 shore A. Tolerance is ± 5 ... , REACH, FDA, NSF, UL, etc.7. Style: O ring, X ring, D ring, V ring, etc.8. Applications: automobile, electrical appliance, mechanical, industrial, ... rubber rings Welcome to checking our other products: standard o ring, seal, gasket, washer, rubber feet, grommet, ect.Thank you very ...