28" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 30 5/8"] Ceiling Mounted with frame and bayonet

Mounted with frame and bayonet joint which are included

actual front end outer dimensions are approximately 22 5/8" width X 12 5/8" height

9% Pure Copper)

Its smooth

Total outer size of this grille is

28" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 30 5/8"] Ceiling Mounted with frame and bayonet+ Product Details Size 28"w X 28"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 30 5 8" width X 30 5 8" height Actual Filter Size 27 3 4"w x 27 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.