... ,medical SBR rubber parts, etc. Description of SBR Rubber Parts With Metal : 1. Materials: SBR,also can be NR, HNBR, MVQ, ACM ... property of anti-skidding. 3. Hardness: 30~90 shore A or IRHD as your request, tolerance is ± 5 shore A, and ... for special products. 4. Size tolerance: exactly upon your request or standard tolerance. 5. Color: black, transparent, green, red, yellow, grey ...