Use the Chief CMS048 48" Speed-Connect Fixed Extension Column (White) to lower your projector or flat panel display an additional 48" (121.9cm) from the ceiling. This column also provides flow-through cable management with a cable exit port for a clean installation. Use in combination with any 1.5" NPT ceiling plate or other accessory. It consists of 1.5" NPT column threaded on both ends. Weight capacity is 500 lbs.