6" x 36" or 36" x 6" Cube Core Eggcrate Return Air Grille Aluminum Bar to Ensure Perfect Smooth Finish

to Ensure Perfect Smooth Finish

Actual Filter Size – 24 3/4"w x 9 3/4" x 1"

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

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

Actual Filter Size – 29 3/4"w x 27 3/4" x 1"

6" x 36" or 36" x 6" Cube Core Eggcrate Return Air Grille Aluminum Bar to Ensure Perfect Smooth Finish+ 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