30" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 32 5/8" X 20 5/8"] Color_Red Oak Wood + Product Details Size -

+ Product Details Size - 30"w X 16"h is the size for the duct opening measurement only

Easy clean Healthy air flow for your HVAC system - noise free components - no vibrating louvers etc

+ Product Details Size - 28"w X 24"h is the size for the duct opening measurement only

Complies with industry standards of USA: ASTM D-882

+ Product Details Size – 36"w X 24"h is the size for the duct opening measurement only

30" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 32 5/8" X 20 5/8"] Color_Red Oak Wood + Product Details Size -+ Product Details Size 30"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 32 5 8" width X 18 5 8" height. Actual Filter Size 29 3 4"w x 15 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.