Replaces a 2' x 2' ceiling tile or mounts above existing 2' x 2' or 2' x 4' ceiling tile to structural ceiling with tie wires Two-piece design offers five different points for mount attachment Includes tie wire supports flush mount tube and offers two knockout panels for outlet boxes Unit has 1-1/2"-11.5 NPT fitting for attchment of extension column Max Load: 50 lb (22.7 kg)