... details: 1.Desription:Silent block,rubber antivibration damping,rubber-metal parts2.Material:Rubber, metal, screw3. Product grade:Environmental ... Nitrile-Butadiene rubber ( NBR), natural rubber (NA) and other rubber materails. Our product include: seal, gasket, washer, O ring, buffer, ... caps,etc. anti vibration mount, rubber metal bonding, silent block, bushing, ...