Aluminum Top-Mount Placard Bumper Bracket has a large face plate that conforms to placard product shapes and provides a solid mounting surface with no placard product overhang. 6 pre-drilled mounting holes align with pre-drilled holes on placard holders, flip placards, and aluminum placards. Mounting holes provide easy vehicle installation (mounting hardware NOT included). Made of heavy-duty .125" thick aluminum alloy. Base plate measures 13" wide x 2-3/4" deep. Mounting holes are 5mm diameter. Complete product measurements 19" W x 19.125" H x 2.75" D.