Flexible connector: Detail: 1. Quick and Economical 2. Strong Air Tight Lock Seams 3. Unmatched durability and Strength 4. Available in various widths of Metal and Fabric 5. Fire rated and High Temp Resistant Fabric is available for special applications 6. Standard roll length is available in 25meters and 50 metersFlexible duct connector 1)slicone connector(wky) It is a specially developed fiberglass fabric, coated on both sides with silicon rubber. It incorporates a very broad temperature range with outstanding resistance of sunlight, and a wide variety of chemicals. 2)fluoro-resin connector(wkf) Coated on both sides with a specially fluorin rubber. Itis specially suited for use in high pressure and high velocity dust systems, and where exposed to toxic fumes or adverse atmospheric conditions. 3)rubber connector (wkp) Coated on both sides with a specially compounded synthetic rubber. It's well suited for flexible connections an outdoor air handling units and ducts. 4)canvas connector(wkd) It is a sturdy woven fabric, heavily coated on both sides with canvas. 5) High quality! connector with glass wool, glass wool is very important for keep temperature in same level. Size:(mm) 35 6035 4560 45 45 70 45 7575 75 7510075 and other size can be made according to customer's requirment.