2Pcs Duct Connector Flange 4" Round Straight Pipe Flange, Black

[WHAT TO GET]: This air duct flange is made of ABS plastic material, which is weather-resistant and impact-resistant. Its durability prevents deformation and fading, and it can withstand temperature changes and indoor humidity environments during daily use. It is durable and not easily deformed or cracked. Ensuring a reliable home ventilation solution, it is a good choice for home ventilation.[WHEN/WHERE TO USE]: Our pipe connector flange suitable for bathrooms, kitchens, offices, and utility rooms, this duct connector flange is designed to connect exhaust fans, inline duct fans, range hoods, and other HVAC systems, helping improve airflow, ventilation efficiency.[WHAT IT IS]: Base outer diameter: 138mm / 5.43inch; Interface outer diameter: 96mm / 3.78 inch, suitable for 4 inch vent hose ; Screw Hole diameter: 4mm / 0.16 inch ; Height: 55mm / 2.17 inch; Color: Black; Material: ABS ; Packing List: 2pcs x ventilation duct fitting[HOW TO USE]: Select the correct duct size, mark the mounting position on the wall or ceiling, and secure the flange with screws through the pre-drilled holes. Then connect the ducting to the collar and seal the joint if needed for a tighter, more efficient airflow.[WHAT TO AVOID]: Please pay attention to selecting the appropriate connection diameter before placing an order.