... our rubber washer· Working temperature: -100 to +300 degrees;· Hardness: 25~95 Shore A;· Working field: Water, Bath shower toilet parts, lube ... UL & SGS certification;· Rubber Material: NBR, HNBR, XNBR, EPDM, CR, NR, SBR, VMQ, FKM, LAS, FVMQ, FFKM, PTFE, PU, ECO, IIR, ... ACR.· Color: Regularly black, red, blue, yellow for rubber material, for silicone, any colors ...