18" x 32" or 32" x 18" Cube Core Eggcrate Return Air Grille rg1010 For a visual guide on

For a visual guide on how to measure your vent hole before ordering a grille

Actual Filter Size – 9 3/4"w x 25 3/4" x 1"

Actual Front End Outer Dimensions Are 16" Width X 6" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

With a 5" diameter for the duct opening measurement

Made of strong ABS plastic

18" x 32" or 32" x 18" Cube Core Eggcrate Return Air Grille rg1010 For a visual guide on+ 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