Peerless CMJ500R1 Lightweight Suspended Ceiling Kit -White Adjustable carriage allows for ideal projector positioning below a 2' x 2' or 2' x 4' standard ceiling tile Pre-assembled, easy to install design reduces installation time Knockouts are provided for electrical outlet boxes and antenna leads Escutcheon ring leaves a clean finish. Includes Kwik-LocTM self locking cable joiners for simple cable support set-up.