CMS Speed-Connect Adjustable Extension Columns can be used with any 1 1/2" NPT accessory to lower projector to desired height. Provides up to 2" range of height adjustment in 1" increments depending on model (6" to 12" lengths). Includes set screw for added rigidity.Primary InformationColor : Black Product Material : Aluminum Product Type : Extension Column Features : Weight Capacity: 500 lbs. (226.79 kg) Dimensions&MiscellaneousDepth : 24 - 36 Inch UNSPSC CodeUNSPSC Code : 43212000