Vent Boot Hanger Boot Style Square to Round Adapter Collar Diameter 10 in Collar Connection Height 10 in Collar Connection Width 12 in Material Steel Compatible Register Height 12 in Compatible Register Width 12 in Duct Size 12 x 12 in Cap/Collar Material Steel Product Type Register Boot Damper Type None Standards Meets LEED IAQ 3.1 Credit Includes Air Tight Foam Gasket Drywall Mud Ring Dust And Debris Cover