Cms speed-connect fixed extension column can be used with any 1 1/2 inches npt accessory to lower projector to desired height. General information - manufacturer - chief manufacturing manufacturer part number - cms-003 manufacturer website address - chiefmfg brand name - chief product series - cms product name - cms fixed extension column product type - mounting extension compatibility - projector; product information - maximum load capacity - 500.00 lb; physical characteristics - height - 3.0 inches;