14" X 6" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 16 5/8" X 8 5/8"] Return Grille + Product Description Upgrade your FLTR M8 308x3 Actual Filter Size 23 Drop Ceilings / Aluminum

+ Product Description Upgrade your HVAC system with a high-quality aluminum return grille designed for a clean

excluding the old vent cover

only measure the "hole" in the wall/duct

Actual Filter Size – 9 3/4"w x 31 3/4" x 1"

Actual Filter Size – 11 3/4"w x 21 3/4" x 1"

14" X 6" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 16 5 8" X 8 5 8"] Return Grille + Product Description Upgrade your FLTR M8 308x3 Actual Filter Size 23 Drop Ceilings Aluminum + Product Description Upgrade your HVAC system with a high quality aluminum return grille designed for a clean excluding the old vent cover