14" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 16 5/8" X 20 5/8"] flat stamped steel this grill will provide the

this grill will provide the design aesthetic you're looking for

+ Product Details Size - 28"w X 18"h is the size for the duct opening measurement only

3 * insulation density is 30kgs/cbm = 0

rust-free aluminum construction with smooth finished edges and counter-sunk screw holes (screws included)

14" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 16 5/8" X 20 5/8"] flat stamped steel this grill will provide the+ Product Details Size 14"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 16 5 8" width X 20 5 8" height Actual Filter Size 13 3 4"w x 17 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.