Peerless 2K46344 av Lightweight Suspended Ceiling Tray Includes tie wires, flush mount tube, and two knockout panels for outlet boxes Use in certain projector mount applications Replaces a 2 ft. x 2 ft. ceiling tile or mounts above existing 2 ft. x 2 ft. or 2 ft. x 4 ft. ceiling tile to structural ceiling with tie wires 2 piece design offers five different points for mount attachment Standard 1.5 in. 11.5 in. NPT fitting for attachment of extension column