... , ACM, FLS, CR, SBR, SI, BR, IR, EPDM, IIR, PU,E/A, ECO, CSM, VITON, FKM, FPM, etc. 2. Characteristics: good physical ... and chemical properties. 3. Hardness: 30~90 shore A or IRHD as your request, tolerance is ± 5 shore ... A, and can be ±3 shore A for special products. 4. Size tolerance: exactly ...