Rubber Seal Descriptions:1. Materials: NBR, SI, HNBR ,ACM ,SBR ,FPM ,CR ,BR, IIR ,NR ,IR PU etc, just as your request.2. Temperature ranqe: -100-280 celsius degrees3. Hardness: between 30-90 shore A or IRHD4. Color: black, transparent, green, red, yellow, etc5. Certifications: all manufacturing...