4 Inch Duct Connector Flange, Metal Straight Pipe Flange Square to Round Interface Air Duct for Heating Cooling Ventilation HVAC System 19mm X 16mm 71inch(D x H)

71inch(D x H)

20pcs x Small Speaker

Inner Size: 150 x 31 x 42 mm / 5

Total Size: 65x43x24mm/2

4 Inch Duct Connector Flange, Metal Straight Pipe Flange Square to Round Interface Air Duct for Heating Cooling Ventilation HVAC System 19mm X 16mm 71inch(D x H)Duct flanges are widely used for air ventilation systems in home, kitchen, bathroom, garage and factory etc. Specification Color: Grey Material: Galvanized Iron Interface Outer Diameter: 95 mm 3. 7 inch Diagonal Mounting Hole Distance: 126 mm 5 inch Distance Between Adjacent Mounting Holes: 80 mm 3. 1 inch Base Size: 135 x 135 mm 5. 3 x 5. 3 inch (L*W) Packing List: 1 x Duct Connector Advantages 1. The connector is made of galvanized iron, which is