24" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 26 5/8" X 20 5/8"] w16h16 Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 29 3/4" x 1"

actual front end outer dimensions are approximately 42 5/8" width X 22 5/8" height -

+ Product Description Upgrade your HVAC system with our 6" Round Air Vent Supply Grille

Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream

actual front end outer dimensions are approximately 22 5/8" width X 24 5/8" height

24" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 26 5/8" X 20 5/8"] w16h16 Actual Filter Size – 13+ Product Details Size 24"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 26 5 8" width X 20 5 8" height Actual Filter Size 23 3 4"w x 17 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.