The CMJ455 Lightweight Suspended Ceiling Kit is easy to use and install. With tile ceilings, it can replace a 2’ x 2’ ceiling tile or be mounted above an existing 2’ x 2’ or 2’ x 4’ ceiling tile. With structural ceilings, it can be mounted with tie wires. In addition, the CMJ455 has 1.5 inch – 11.5 NPT fitting for extension column attachment, a flush mount tube and two knockout panels for outlet boxes. The kit does not, however, included hanger brackets (ACC455).