... to install;Heat reflection,heat insulation,sound insulation,anti-radiation,anti-vibration Description: This is a new environmentally- ... install;3.Heat reflection,heat insulation,sound insulation,anti-radiation,anti-vibrationand shielding;4.Moisture barrier,sun-proof, ... ventilating pipe.Technical parametersMaterial Structure : AL/ Woven Cloth / Bubble/ Woven Cloth / ALBubble size Diam 20mm H 7mmBubble ...