FA138T87FRK is UL classified for fire-resistance in the United States and Canada. The FA138T87FRK has passed a fire-rating up to three hours (rating varies by ceiling construction) and has been tested in accordance with the UL standard - Fire Test of Building Construction and Materials, ANSI/UL263 (ASTM E119, NFPA 251). FA138T87FRK assembly includes a enclosure-fiber kit, UL listed speaker/transformer assembly, and UL Listed baffle. Each enclosure-fiber kit includes pre-cut fiber panels, metal enclosure, rail set and hardware. The speaker/transformer approved for use with the FA136T87FRK are FR versions of the industry standard Atlas Sound Strategy Series FA136, FA138 models and the C803A, C10A, and FC104 loudspeakers.