Show Sulutions Inc's PB-H1200FPS steel base plate measures 30" x 30" with four coutersunk pre drilled holes for 12" box truss. The steel base plate is ideal for outdoor applications where a heavier support base is needed, such as in windy conditions. Powder coated in a glass black finish. The PB-H1200FPS is designed for 12" x 12" truss only.