1.ISO 9001:2000,SGS 2.Light weight,easy to maintenance 3.Weather Resistance, fire-proofing 4.Fast delivery and good service It's made of a layer of silicate modified fireproof rigid polyurethane, foam coated with aluminum foils, and is a new alternative to galvanized ducts. Easy to install, it has a high density, good insulation, low leakage of air (which saves energy), easy to clean, ...