12" X 12" STEEL/WHITE PERFORATED FILTER BACK CEILING DIFFUSER, STEEL CONSTRUCTION, THE HINGED PERFORATED FACE ALLOWS ACCESS TO THE FILTER, ROUGH OPENING DIMS:12"W X 12"L, DIMS:3 1/2"H X 23 3/4"W X 23 3/4"L, WEIGHT:6 LBS 2 OZ, BULK, MADE IN UNKNOWN