auto rubber part: 1) OEM service; 2) High and low ... , IIR, ACR.· Color: Regularly black, red, blue, yellow for rubber material, for silicone, any colors are available according to your panton #; · ... the following features of all kinds rubber material, please choose the suitable one for your items, thanks. Material NameHardnessWorking Temperature ... ~91 -25~327 1050LF, 4079, 6375, 7075 NBR Rubber Parts