Characteristics for viton o ring good physical and chemical properties. Description of viton O Ring:1. Materials: can be NBR, Viton, EPDM, SI, HNBR, BUNA, MVQ, ACM, FLS, CR, SBR, SI, BR, IR, IIR, PU,E/A, ECO, CSM, FKM, FPM, etc.2. Characteristics: good physical and chemical properties.3. Hardness: 70~90A or as your request.4. Size tolerance: exactly upon your request or standard tolerance.5. ...