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. Notched adjustment design for length changes without disassembly. Aluminum construction for easier installation also saves on shipping costs. **Compatible for screens having VESA 75 x 75mm or 100 x 100mm compliant mounting patterns. To confirm the compatibility of this mount with your flat panel TV or monitor visit Chiefs MountFinder Pro. MountFinder Pro will also help you determine if an interface bracket must be ordered separately. Features: -The revolutionary notched design allows for lightning-fast height adjustments -Flow-through cable management with cable exit port -All-aluminum construction