Chief's Fusion ceiling mounted stacking solutions make it possible to install multiple displays vertically. Great for digital signage installations. Bundled solution containing 2 flat panel ceiling mounts and 1 CPA048P 4ft predrilled column For connecting to longer drop length 1.5 NPT extension columns you must order CPA264 separately For connecting to longer drop length pin connection columns you must order CPA263 separately Provide aesthetic covering to the rear side of the displays components and mount using the Chief Fusion Universal Back Covers . This product ships in approximately 1 days