Inflatable rubber ball (fender) is a kind of ship accessory that buffers and protects the ship upon berthing and now is widely used in ships, ocean platform, offshore facilities, wharf and yacht etc. The inflatable rubber ball is more practicable than general rubber fender and effectively economic and therefore becomes popular among the customers. The inflatable rubber ball is a rubber-sealed vessel with rubber-dipped fabrics as skeleton, which could float on waters after injected with compressed air and then used as STS and STD buffer. Meanwhile, the inflatable rubber ball could absorb the impact energy of ships and reduce its reactive force and greatly improve the safety of ships upon berthing. Inflatable rubber ball (fender) is a kind of ship accessory that buffers and protects the ship upon berthing and now is widely used in ships, ocean platform, offshore facilities, wharf and yacht etc. The inflatable rubber ball is more practicable than general rubber fender and effectively economic and therefore becomes popular among the customers