The system 16/70RS is a complete shallow depth lightweight 1' x 2' ceiling tile replacement loudspeaker system consisting of an 8C10FEPAX - 8" outer diameter foam edge surround, dual cone loudspeaker with 10oz. magnet and TBL70 - 4W-70V rotary select transformer. Molded fiber enclosure is 617 CID. MicroPerf, steel baffle with two (2) seismic tie-off points. Cable clamp and one (1) 24" T rail for finishing the edge are included. No assembly required.