10" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 12 5/8" X 20 5/8"] rg1010 Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 13 3/4" x 1"

actual front end outer dimensions are approximately 20 5/8" width X 10 5/8" height

actual front end outer dimensions are approximately 27 5/8" width X 38 5/8" height

Actual Filter Size – 35 3/4"w x 23 3/4" x 1"

Pre-flared ends with nuts are for simple and easy installation

10" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 12 5/8" X 20 5/8"] rg1010 Actual Filter Size – 23+ Product Details Size 10"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 12 5 8" width X 20 5 8" height Actual Filter Size 9 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. Our