Oil-resistant rubber joint sphere is composed of inner rubber layer, reinforcement layer with multi-layer scraping nylon cord fabric, outer rubber layer compound rubber tube. Nitrile rubber (NBR) Copolymer of butadiene and acrylic. Features are particularly good resistance to gasoline and aliphatic hydrocarbon oils, second only to polysulfide rubber, acrylate and fluorine rubber, and better than other general-purpose rubber. It has good heat resistance, good air tightness, wear resistance and water resistance, and strong adhesion.

