N/a manufacturer / supplier in China, offering Double Sided Aluminum Foil Pre-Insulated Polyurethane Foam Air Duct Aluminum Foil Phenolic Board, New Arrival Fireproof Phenolic Foam Fireproof Surface Insulation Phenolic Board, Customization Various Flange Fittings Invisible Flange H Bayonet Joint Connection for Pre-Insulated HAVC Duct Accessories and so on.