Enhance your home's ventilation system with the primary Ventilation Interface DIY Range Hood Connector Square Bottom Purifier Round Connector. This interface features a square bottom flange design, making it incredibly convenient to install and connect. It is the perfect solution for DIY range hoods and purifiers, providing efficient air purification and ensuring a clean and fresh indoor environment. Crafted from plastic materials, it is built to withstand long-term use without easily getting . With its user-friendly design, it allows for easy installation and maintenance. Features -Color:Black -Material:Plastic -Size:12.00X12.00X7.00cm/4.72X4.72X2.75in Hole distance:105mm Suitable diameter: 100mm -The square bottom straight flange design of the central ventilation system diy range hood connector ensures easy installation. -The diy range hood and purifier compatibility of the Duct Transition Fitting allows for convenient use in various settings. -The purification provided by the duct Connector ensures a clean indoor environment. -The durable materials used in the Transition Fitting long-term use without any damage. -The user-friendly operation of the Vent Adapter allows for easy self-installation and maintenance. Package list: 4 x duct reducer