Interface Outer Diameter: 195 mm / 7.7 inch; Diagonal Mounting Hole Distance: 213 mm / 8.4 inch; Distance Between Adjacent Mounting Holes: 108 mm / 4.3 inch; Base Outer Diameter: 224 mm / 8.8 inch; Color: Grey; Material: Galvanized Iron; Packing List: 1 x Duct ConnectorAdvantages: 1. The connector is made of galvanized iron, which is anti-corrosion, cold-resistant, high-temperature resistant, not easily deformed, and durable. 2. The base of the connector has screw mounting holes, no drilling is required, and it is directly fixed on the wall with screws, which is easy to use. 3. The surface of the ventilation flange is smooth, which is conducive to connecting the air duct.Instruction: Screw the flange securely to the air inlet, air outlet, wall, ceiling or other surface for connecting to the ventilation system.
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