PVC flange rubber flexible joint is mainly used to reduce vibration, noise, good scalability and easy to use. Single ball rubber soft joint is also known as single ball rubber soft joint, single ball soft joint, shock absorber, pipeline shock absorber, shock absorber throat, etc. it is a kind of pipe joint with high elasticity, high air tightness, medium resistance and weather resistance. The product takes advantage of the elasticity, high air tightness, medium resistance, weather resistance and radiation resistance of rubber. It is made of polyester cord fabric with high strength and strong cold and hot stability after being diagonally compounded and vulcanized by high pressure and high temperature mold. Single ball rubber flexible joint is a kind of rubber part and flat movable joint reinforced by fabric. It is a kind of pipe joint with high elasticity, high air tightness, medium resistance and weather resistance.