20" x 12" Steel Return Air Filter Grill for 1" Filter Removable Face/Door Compatible With Duct 6in + Product Details Size –

+ Product Details Size – 6" x 18" or 18" x 6" is the size for the duct opening measurement only

The premium durable material guarantees that they will never rust or wear through

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 34" Or 34" x 32" duct opening (measured at the opening)

With a 8" diameter for the duct opening measurement

3-cone supply grille

20" x 12" Steel Return Air Filter Grill for 1" Filter Removable Face/Door Compatible With Duct 6in + Product Details Size –+ Product Details Size 20"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 5 8" width X 14 5 8" height Actual Filter Size 19 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.