20" X 24" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 26 5/8"] flat stamped steel Just run your finger along

Just run your finger along the edge of the top plate and you will find a smooth finished surface

Installation Location – Sidewall and ceiling

Actual Filter Size – 19 3/4"w x 19 3/4" x 1"

3 * insulation density is 30kgs/cbm = 0

actual front end outer dimensions are approximately 10 5/8" width X 32 5/8" height

20" X 24" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 26 5/8"] flat stamped steel Just run your finger along+ Product Details Size 20"w X 24"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 5 8" width X 26 5 8" height Actual Filter Size 19 3 4"w x 23 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.