18" X 34" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 36 5/8"] 18in diameter crafted from 99

crafted from 99

875" width X 15

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

Mounted with a frame and bayonet joint

Our filter grille latch is easy to use on your fingers and requires no screwdriver to open

18" X 34" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 36 5/8"] 18in diameter crafted from 99+ Product Details Size 18"w X 34"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 20 5 8" width X 36 5 8" height Actual Filter Size 17 3 4"w x 33 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.