26" X 16" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 28 5/8" X 18 5/8"] Copper Coil + Product Details Size -

+ Product Details Size - 4"w X 18"h is the size for the duct opening measurement only

We pride ourselves on offering top-of-the-line products that meet the highest standards

is fireproof and ensures efficient thermal performance

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 18" duct opening (measured at the opening)

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

26" X 16" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 28 5/8" X 18 5/8"] Copper Coil + Product Details Size -+ Product Details Size 26"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 28 5 8" width X 18 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