The CMS491C conceals AV equipment above a 2' X 2' ceiling tile and supports a 1.5" NPT column drop for mounting projectors within the same tile grid providing a clean professional look for classrooms and conference rooms.- Optimal pipe flexibility within the tile helps with less reliance on image correction improving image quality- Drop carriage door improves accessibility and serviceability providing full access to equipment- Detachable power housing can be pre-installed with electricians on site and assembled to the storage box at a later timeInside the plenum box or facing the room- Up to 2 single gang or 1 dual gang outlet- 4 nested knockouts for 1-1/4", 1", & ½" diameter conduitBuilt in ventilationAV tray supports a variety of AV components- Ships with 1 shelf, 2nd shelf sold separately see CMSUNV1Overall weight capacity 100 lbs (45 kg)- 50 lbs (22 kg) for projector ceiling plate- 25 lbs (11 kg) per shelf location- Ships with speed connect installation hardware- Lightweight construction, one man installation- Plenum rated, UL approved in accordance to 2043- TAA Compliant