36" X 8" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 10 5/8"] 10" Round Duct Pipe Built-In Locking System – Comes

Built-In Locking System – Comes with a permanently attached eight-tumbler lock and a supplied key for added security

We carry sizes the big box stores don't

actual front end outer dimensions are approximately 18 5/8" width X 18 5/8" height

+ Product Details Size - 30"w X 24"h is the size for the duct opening measurement only

Actual Filter Size – 29 3/4"w x 35 3/4" x 1"

36" X 8" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 10 5/8"] 10" Round Duct Pipe Built-In Locking System – Comes+ Product Details Size 36"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 38 5 8" width X 10 5 8" height Actual Filter Size 35 3 4"w x 7 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