Product Name: 80mm Duct Fast Clamp for Ventilation Ducting Model NO.: FC Performance: Durable,Corrosion,Intensity,Tighten Shape: Equal Application: Textile, Papermaking, Welding Booths,etc Usage: for Air Conditioner, Industrial, for Environment Protection, Commercial,Residential,HVAC Material: Galvanized Sheet Color: Silver Connection: Tighten Transport Package: Carton Origin: Zhejiang, China Product Description Spiral duct fittings fromprofessionalspiralductmanufacturer.DescriptionEasy and fast To InstallIt's Re-useableIt's Easy To CleanAdded stability and strength for heavier applicationsOpen and close quickly to help create a tight sealHelp simplify ductwork reassemblyIt Fits Most ApplicationsMaterialgalvanized or stainless steelTechnicsrolledshaperound or other shapessizeas requiredOperation Pressure5000 Pa negative to 3000 Pa positiveDelivery Timeaccording to actual quantity