Peerless-AV DCS200 Structural Ceiling Adapter w/Stress DecouplerThe DCS2 structural 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. Unit has 1 1 2" 11. 5 NPT fitting for attachment of extension column For single display applications Includes integral high density rubber decoupler assembly to prevent