36" X 8" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 10 5/8"] Insulated Line and durable finish that resists

and durable finish that resists scratches and maintains a clean

Actual Filter Size – 13 3/4"w x 11 3/4" x 1"

Easy Installation – Complete set of sponge gasket and mounting frame included

Think of the diameter as a straight line from one end to the other

36" X 8" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 10 5/8"] Insulated Line and durable finish that resists+ Product Details Size 36"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 38 5 8" width X 10 5 8" height Actual Filter Size 35 3 4"w x 7 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. Our