Rubber Washer O Ring: 1. Perfect for mounting parts; 2. Good insulation property 3. Conforms to SAE criteria The bellowing is the detailed in formation of this product: rubber washer rubber gasket products Features: 1. Materials: NBR, SI, HNBR ,ACM ,SBR ,FPM ,CR ,BR, IIR ,NR ,IR PU etc, just as your request.2. Temperature ranqe: -100-260 celsius degrees3. Hardness: between 30-90 shore A4. Color: ...