The 10" backplate panels is a mounting panel designed for the 10" house and letters. The back plate is available in the following sizes that accommodate a single 10" digit or a combination of 4 digits. The mounting panels are machined from a solid piece of aluminum with a 4mm solid material thickness. The numbers / letters are mounted onto the panel which are pre-drilled holes based on the exact numbers and letters that have been order. Concealed mounting studs anchor the panel to the wall. The 10" backplate mounting panels are available in a satin black, bronze, satin alu or in satin brass color. All 10" backplate panels already include the spacers and mounting hardware. How do you order the plate? The panel can only be ordered in conjunction with the 10" numbers and letters. Please select the they of 10" numbers you are ordering. The second step is to add the backplate panel. All panels are pre-drilled and ship fully assembled making installation very easy.