Peerless-AV DCT100 Truss Ceiling Mount with Decoupler for Peerless Jumbo TV MountsThe DCT100 ceiling plate is compatible with 1 1 2 11. 5 NPT threaded EXT or AEC columns for single unit mounting applications and includes an integral high density rubber decoupler assembly to prevent vibrations from being passed onto the display mount or projector mount. For single display installations only Includes integral high density rubber decoupler assembly to prevent vibrations Attaches to round, square, rectangle, or I beam trusses up to 3"