For use with 2" x 4" construction. The flange is removable for retrofit installation-Main Features- Material: Plastic-Height: 5.1"-Width: 3.6"-Depth: 1.2"-- - - - Marketing Information- For use with 2" x 4" construction. The flange is removable for retrofit installation- - - Information- Name:MOUNTING PLATE FOR 2 X 4 STUDSCategory:Fittings ?Central VacuumUPC Code:800696000038 Also known as -Hayden/Canplas Llc MOUNTING PLATE FOR 2 X 4 STUDS - HC-1041