... 3,Material:Rubber,Steel 4,12 years producing experience Rubber Coupling 1.characteristics1)Based on the high elasticity,high air- ... no pipe bearing sound high temperature resistance and corrosion resistance,for the rubber has higher air-tightness absolute no leakage, ... system.Our product is mainly used as the pipe line for city governments petrify,chemical industry,metallurgy,petroleum,chemistry,ships, ...