30" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - Black - [Outer Dimensions: 32 5/8" X 18 5/8"] Return Grille #hvac-product-accordion { border: 2px solid Compatible with Duct 4" Product Details Size 32 LO246

#hvac-product-accordion { border: 2px solid #5296DD

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 18" duct opening (measured at the opening)

+ Product Details Size - 6"w X 28"h is the size for the duct opening measurement only

With our extensive selection of Grilles

actual front end outer dimensions are approximately 18 5/8" width X 16 5/8" height

30" X 16" Steel Return Air Filter Grille for 1" Filter Removable Frame Black [Outer Dimensions: 32 5 8" X 18 5 8"] Return Grille #hvac product accordion { border: 2px solid Compatible with Duct 4" Product Details Size 32 LO246 #hvac product accordion { border: 2px solid #5296DD + Product Details Perfect Fit & Easy Sizing Designed for a 18" x 18" duct opening (measured at the opening)