14" STEEL/WHITE CURVED BLADE PERFORATED FACE SUPPLY, STEEL CONSTRUCTION, REMOVABLE HINGED FACE ALLOWS FOR EASY ACCESS TO AIR PATTERN CONTROL CORE, INDIVIDUALLY ADJUSTABLE PATTERN DEFLECTORS FACTORY-SET AT 4-WAY DELECTION, CAN BE FIELD ADJUSTED FOR 1,2,3-WAY AIR PATTERNS, ACCEPTS 3800 SERIES BUTTERFLY DAMPER(ORDER SEPERATELY), COLLAR SIZE:14", DIMS:5"H X 23 3/4"W X 23 3/4"L, WEIGHT:7 LBS 12 OZ, BULK, MADE IN USA.