12" x 18" or 18" x 12" Cube Core Eggcrate Return Air Grille w25h25 + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 24" OR 24" X 14" duct opening (measured at the opening)

+ Product Spec Sheet

listed size +2" diameter

+ Product Details Size – 8" x 34" or 34" x 8" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 28 5/8" height

12" x 18" or 18" x 12" Cube Core Eggcrate Return Air Grille w25h25 + Product Details Perfect Fit+ Product Details Size 12" x 18" or 18" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 19. 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