SYSTEM5/8 is a complete shallow depth, lightweight loudspeaker assembly with an 8" O.D. extended frequency range speaker, multi-tap transformer, standard or MicroPerf perforated steel grill and integral molded 617 CID fiber enclosure. Includes one 24" "T" bar to finish edge. Grille finish: White or black baked epoxy hybrid. SYSTEM 5/8 is UL Listed 1480- (UEAY, UAEY7-Canada) when installed in accordance with supplied installation instructions, requirements of NEC and AHJ. City of Chicago Approved.