26" x 26" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 34" Or 34" x 32" duct opening (measured at the opening)

this HVAC vent duct cover ensures durability and reliability

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 24" or 24" x 12" duct opening (measured at the opening)

Actual Filter Size – 31 3/4"w x 17 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 24" OR 24" X 16" duct opening (measured at the opening)

26" x 26" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe + Product Details Perfect Fit+ Product Details Size 26" x 26" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27. 75" X 27. 75". High Quality High quality, rust free aluminum construction with smooth finished edges and counter sunk screw holes (screws included); no sharp edges.. Installation Location sidewall and ceiling. Design Cubic core eggcrate design Offers highest airflow efficiency at almost 95%, reducing electric