This classic Contemporary design will enhance any room in your old or new home. Cast from 100% solid brass, this style of register is available in five finishes: polished and lacquered brass, pewter, dark bronze, polished chrome, and antique brass. These are not drilled with screw holes for a clean look. Lip adds approximately 1-1/2" total on each side to dimensions for an overall size. Louvers are attached and adjusted by a small black toggle switch that is accessed at the end of the register on the top surface. Inside, or boot dimensions are 4" x 10".