18" x 32" or 32" x 18" Cube Core Eggcrate Return Air Grille w14h14 + Product Details Size –

+ Product Details Size – 6" x 20" or 20" x 6" is the size for the duct opening measurement only

+ Product Details Size – 18" x 20" or 20" x 18" is the size for the duct opening measurement only

Universal Fit – Measures 3-7/8" wide x 3-1/2" high x 3" deep

actual front end outer dimensions are approximately 12 5/8" width X 8 5/8" height

+ Product Details Outer dimensions: 19

18" x 32" or 32" x 18" Cube Core Eggcrate Return Air Grille w14h14 + Product Details Size –+ Product Details Size 18" x 32" or 32" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" X 33. 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