18" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter White + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 18"w X 14"h is the size for the duct opening measurement only

Operating temperature from -40°f to +248°f [-40°c to +120°c]

+ Product Details Size - 16"w X 36"h is the size for the duct opening measurement only

Installing the plaster frame is effortless – secure it into your sheetrock

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18" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter White + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 18"w X 14"h is the size for the duct opening measurement only Operating temperature from 40°f to +248°f [ 40°c to +120°c]