16" x 32" or 32" x 16" Cube Core Eggcrate Return Air Grille 10in diameter + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 20" x 34" or 34" x 20" is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 12" duct opening (measured at the opening)

also referred to as T-Bar or Lay-in system

+ Product Details Size – 16"w X 8"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 8" duct openings

16" x 32" or 32" x 16" Cube Core Eggcrate Return Air Grille 10in diameter + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 20" x 34" or 34" x 20" is the size for the duct opening measurement only + Product Details Perfect Fit & Easy Sizing Designed for a 12" x 12" duct opening (measured at the opening)