Molded bellows are available in a several rubber materials including NR, CRor silicone rubber and in a large variety of shapes MaterialsSI, also NBR, SI, HNBR, ACM, SBR, FPM, CR, BR, IIR, NR, IR, PU, etc, just as your request.Hardness30~90 shore A or IRHD.Temperature-100~250...