40" X 10" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 42 5/8" X 12 5/8"] Supply Grille + Product Details Size –

+ Product Details Size – 24" x 24" is the size for the duct opening measurement only

+ Product Details Size - 16"w X 24"h is the size for the duct opening measurement only

+ Product Details Size – 36"w X 14"h is the size for the duct opening measurement only

Our innovative adjustable design changes the game

40" X 10" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 42 5/8" X 12 5/8"] Supply Grille + Product Details Size –+ Product Details Size 40"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 42 5 8" width X 12 5 8" height High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Ceiling Design Fixed hinged for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and