CMA450 Features: -Easy to install, flexible solution. -Nine mounting hole positions with threaded ends for 1-1/2'' NPT extension column (not included). -2'x2' plate sits unseen above a suspended ceiling. -Secured with four tie wires and a safety cable. Product Type: -Ceiling plate. Color: -White. Dimensions: Overall Height - Top to Bottom: -1.1 Inches. Overall Width - Side to Side: -23.8 Inches. Overall Depth - Front to Back: -23.8 Inches.