... delivery & top quality 4) Professional service Features of our silicone rubber gasket:· Working temperature: -100 to +300 degrees;· Hardness: 25 ... Strength, Wear and tear resistance, Durable;· UL & SGS certification;· Rubber Material: NBR, HNBR, XNBR, EPDM, CR, NR, SBR ... .· Color: Regularly black, red, blue, yellow for rubber material, for silicone, any colors are available according to your panton #; ...