6" x 36" or 36" x 6" Cube Core Eggcrate Return Air Grille Aluminum Bar + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 32" or 32" x 8" duct opening (measured at the opening)

Ring Base Design – Allows for easy installation without removing the thermostat

actual front end outer dimensions are approximately 20 5/8" width X 34 5/8" height

+ Product Details 12"w X 4"h Is The Size For The Duct Opening Measurement Only

6" x 36" or 36" x 6" Cube Core Eggcrate Return Air Grille Aluminum Bar + Product Details Perfect Fit+ Product Details Size 6" x 36" or 36" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 37. 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