... . 3. Weather proof. Oil seal1. Applications: used in automobile, industrial, mechanical, medical, or special purpose. 2. Materials: HNBR, also HNBR, NBR, SI ... , KTW, WRAS,etc. 5. Hardness: between 30-90 shore A or IRHD. 6. Performance: heat resistant, weather proof, oil proof, wear ... orders are highly welcomed according to your 2D,3D drawing or samples,.