20" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 22 5/8" X 22 5/8"] Aluminum Bar Great emphasis has been invested

Great emphasis has been invested in the design of this product to prevent it from kinking in sharp bends & turns and to hold steady and at full diameter in all applications

Complies with industry standards of USA: ASTM D-882

providing maximum flexibility

actual front end outer dimensions are approximately 14 5/8" width X 14 5/8" height

20" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 22 5/8" X 22 5/8"] Aluminum Bar Great emphasis has been invested+ Product Details Size 20"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 5 8" width X 22 5 8" height Actual Filter Size 19 3 4"w x 19 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.