Nfrared Burner, [ 18-1/2" x 6-3/4" OD ( Less Orifice ) ] Steel [ Orifice - #46 w/ Thd Bracket ] 185, 000 BTU Top of Box 16-3/4" x 6-3/4" Ceramic Burn Area 15-1/4" x 5-1/4", Box Only 15-5/8" x 5-3/4" Garland Rankin-delux Broiler Rdcm 15, Rdgm Cheesemelter.