The ball of rubber joint of screw thread fan coil pipe is composed of rubber pipe with inner rubber layer, reinforced layer with multiple layers of rubber polyamide cord cloth and outer rubber layer.The rubber material that USES according to medium different also is different, have natural gum, butadiene gum, butyl gum, nitrile gum, epdm, neoprene gum, silicone rubber, fluorine rubber and so on.They are resistant to heat, acid and alkali, corrosion, abrasion and oil, etc.The product has the characteristics of high pressure resistance, good elasticity, large deflection displacement, aging resistance, easy installation, strong selectivity and good shock absorption, etc