10" x 18" or 18" x 10" Cube Core Eggcrate Return Air Grille w25h25 Equipped with a locking eight-tumbler

Equipped with a locking eight-tumbler key system

7/8" - 3397 PSI

actual front end outer dimensions are approximately 8

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

Mounted with a frame and bayonet joint

10" x 18" or 18" x 10" Cube Core Eggcrate Return Air Grille w25h25 Equipped with a locking eight-tumbler+ Product Details Size 10" x 18" or 18" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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