12" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 18 5/8"] RG66 Black-HP Complies with industry standards of

Complies with industry standards of USA: ASTM D-882

you have 16 different varieties to choose from

Actual Filter Size – 17 3/4"w x 15 3/4" x 1"

Actual Filter Size – 23 3/4"w x 11 3/4" x 1"

Actual Filter Size – 21 3/4"w x 25 3/4" x 1"

12" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 18 5/8"] RG66 Black-HP Complies with industry standards of+ Product Details Size 12"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5 8" width X 18 5 8" height Actual Filter Size 11 3 4"w x 15 3 4" x 1" High quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter