... Hydraulic Rubber O-Ring :1. O-rings is the simplest parts in the field of seals, although it's the best ... strap, type, controlling equipment and vibration absorber.It could be made by many kinds of raw materials, such as NBR, SBR, Silicone ... quantity, DHL/FEDEX/UPS/TNT-express fee will be born by the buyer;2) Large quantity, sea/air freighthigh quality Hydraulic ...