12" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included *[Outer Dimensions: 14 5/8" X 14 5/8"] Insulated Line Check Out This Asin For

Check Out This Asin For Matching T-Bar Drop-Ceiling Grille: B007CNEJZK

+ Product Details Size - 4"w X 20"h is the size for the duct opening measurement only

Simplified Installation: Our Butterfly Damper ensures easy setup

+ Product Details Size - 24"w X 4"h is the size for the duct opening measurement only

+ Product Details Size - 4"w X 32"h is the size for the duct opening measurement only

12" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included *[Outer Dimensions: 14 5/8" X 14 5/8"] Insulated Line Check Out This Asin For+ Product Details Size 12"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5 8" width X 14 5 8" height Actual Filter Size 11 3 4"w x 11 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.