10" x 36" or 36" x 10" Cube Core Eggcrate Return Air Grille 14in diameter Constructed from sturdy 20-gauge steel

Constructed from sturdy 20-gauge steel

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Locking Security System – Features a built-in eight-tumbler lock and a supplied key to prevent tampering and maintain consistent temperature settings

+ Product Details Size – 16"w X 8"h is the size for the duct opening measurement only

10" x 36" or 36" x 10" Cube Core Eggcrate Return Air Grille 14in diameter Constructed from sturdy 20-gauge steel+ Product Details Size 10" x 36" or 36" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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