[WHAT TO GET]: This air duct reducer is made of aluminum alloy, which is rust-proof and corrosion-resistant. The smooth surface of the duct reducer can effectively reduce pipe connection resistance. Universal size design, suitable for most standard ventilation ducts.[WHEN/WHERE TO USE]: This flue liner reducer tubing connector can be used with ventilation ducts and can be used in household or commercial HVAC systems, air conditioning equipment, drum dryers, exhaust fans, range hoods, etc. It can adapt to ventilation ducts of different specifications, ensuring the stable operation and smooth ventilation of various exhaust equipment.[WHAT IT IS]: Interface outer diameter: 100 mm / 4 inch, 125 mm / 5 inch; Height: 120 mm / 4.7 inch; Thickness: 1mm / 0.04"; Packaging content: 2pcs duct reducer.
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