Unit has 1 1/2" 11.5 NPT fitting for attachment of extension column Features two cord management access holes Reduces vibrations that may cause internal damage to equipment and/or cause display image to vibrate For wood joist ceiling The Vibration Absorber Ceiling Mount for wood installations reduces unwanted vibrations on mounting surface that may cause internal damage or cause interference with projector image. If mounting to Unistrut, order model ACC 845.- Shock absorbing rubber bumpers isolate mounting point to projector from main mounting surface- Mounts directly to wood joist finished ceilings, exposed wood joists or wood beam ceilings only- Cord management access holes allow cords to run through the extension column and exit to a power source (note:ACC 800 is needed for Vector Pro cord management)- For use with Peerless Projector mounts- Accepts Peerless EXT or ADJ 1 1/2schedule 40 extension columns- Scratch resistant black fused epoxy finish Features Maximum weight capacity 2