6" x 8" or 8" x 6" Cube Core Eggcrate Return Air Grille Color_R-8.0 Pink + Product Details Size –

+ Product Details Size – 16" x 36" or 36" x 16" is the size for the duct opening measurement only

The total outer size of this grille is the listed size plus 1

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 26" OR 26" X 16" duct opening (measured at the opening)

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Actual Filter Size – 15 3/4"w x 31 3/4" x 1"

6" x 8" or 8" x 6" Cube Core Eggcrate Return Air Grille Color_R-8.0 Pink + Product Details Size –+ Product Details Size 6" x 8" or 8" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" width X 9. 75" height. 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%,