36" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 20 5/8"] 8in diameter This thoughtful design ensures optimal Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

This thoughtful design ensures optimal air circulation for your HVAC system

Actual Filter Size – 9 3/4"w x 35 3/4" x 1"

+ Product Details Size – 6" x 12" or 12" x 6" is the size for the duct opening measurement only

[Outer Dimensions: 26

actual front end outer dimensions are approximately 27 5/8" width X 30 5/8" height

36" X 18" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 38 5 8" X 20 5 8"] 8in diameter This thoughtful design ensures optimal Compatible With Duct 7in Applications This sheet metal DDAG A 1212 This thoughtful design ensures optimal air circulation for your HVAC system Actual Filter Size – 9 3 4"w x 35 3 4" x 1"