Duct adapter ensure smooth airflow by seamlessly connecting two duct openings of different sizes. Suitable for HVAC systems in bathrooms, kitchens, apartments, homes, offices, hotels, direct exhaust fans, range hoods, toilets, laser engravers, 3D printers, diesel heaters, roof vents, and more.SpecificationColor: WhiteMaterial: PVC PlasticTransition Between 4 inch and 3 inch Diameter DuctsPort Inner Diameter: 75-100 mm / 2.95-3.94 inchPort Outer Diameter: 78-103 mm / 3.07-4.06 inchHeight: 80 mm / 3.15 inchAluminum Foil Tape Size: 50 mm x 10 M x 0.06 mm / 2 x 393.7 x 0.
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