Rectangular to Round: Seamlessly transform your ductwork with this Duct Transition, designed for optimal flow and easy system modification Compatibility: This versatile galvanized transition connects perfectly with exhaust fans, dryer vent covers, and various ventilation seals, enhancing your system's overall efficiency Material: Crafted from galvanized iron sheet metal, this Vent Adapter features a smooth, functional silver finish that ensures long time performance and a clean look for your setup Easy Installation: This rectangular to round duct is easy to install, Improves flow and increases the overall efficiency of the ventilation system Wide Application:Rectangular to Round Duct is ideal for residential HVAC systems, large commercial buildings, industrial ventilation systems, shop, manufacturing facilities, commercial kitchens, agricultural settings Size Chart:25.4cmx8.2cmx17.8cm/10.00inchx3.23inchx7.01inch mouth diameter:10cm/3.94inch Package Includes: 1Duct Transition Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.