12" X 4" STEEL/WHITE 2-WAY REGISTER MULTI-SHUTTER DAMPER, ALL-STEEL CONSTRUCTION, CEILING OR SIDEWALL INSTALLATIONS, FOR HEATING OR COOLING, IDEAL FOR SHALLOW DUCT INSTALLATIONS, 2-WAY DEFLECTION, 1/3" SPACED FINS SET AT 20 DEGREES, GALVANIZED MULTI-SHUTTER VALVE, 1 5/8" DEPTH WHEN FULLY OPENED, INTERLOCKING VALVE LOUVERS FOR POSITIVE SHUT-OFF, ROUGH OPENING DIMS:4"W X 12"L, DIMS:2 3/4"H X 5 1/4"W X 13 1/4"L, WEIGHT:1 LB 2 OZ, BULK, MADE IN USA.