Rubber-plastic heat insulation pipe Wall thickness 3/8", 1/2", 3/4", 1" Diameter ... 1/4"to 4-1/2" Rubber-plastic heat insulation pipe Wall thickness 3/8", 1/2", 3/4", 1" Diameter ... etc. It has the good resisting dew-together capability, sound absorption, shock absorption, Low density, Obturation air bladder frame, Low thermal conductivity ...