Hamilton Sinkler Decorative Cast Bronze Scroll Vent Floor Register - 6x6in. (Bronze Patina) HAM-HVT-606-BP This solid cast bronze dome vent floor register (with damper) combines beauty and character with rugged dependability and functionality. Faceplate made of over 1/8 of solid cast bronze. There are no holes on the face plate so simply drop into place. Louvers are attached with machine screws so no duct tape is required. Comes in a beautiful dark distressed bronze patina finish. To determine the size of register you require, measure the opening duct in the floor itself.