34" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter fixed bar Ideal for Walls & Ceilings: Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 12" duct openings

actual front end outer dimensions are approximately 7

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+ Product Details Size - 16"w X 20"h is the size for the duct opening measurement only

allowing you to take control of indoor air circulation without complications

34" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter fixed bar Ideal for Walls & Ceilings: Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 12" duct openings actual front end outer dimensions are approximately 7