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 Every grille has a front

Every grille has a front end frame that will overlap at the wall joint

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

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

4" X 10" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

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 Every grille has a front+ 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.