Pid Duct, Pre-Insulated Duct Panel, PIR Duct Panel manufacturer / supplier in China, offering 10-80mm Thickness Roof Flooring Wall PU Foam Insulation Board, 600/1200mm Fiberglass Coated Thermal Insulation Foam Polyurethane Panel, Pre-Insulated Ductwork Vertical Connection Joint PVC Tee Profile Flange and so on.