28" x 32" or 32" x 28" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in + Product Details Size –

+ Product Details Size – 28" x 34" or 34" x 28" is the size for the duct opening measurement only

+ Product Details Size - 8"w X 30"h is the size for the duct opening measurement only

75"H – fits a 10" x 8" duct opening

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

28" x 32" or 32" x 28" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in + Product Details Size –+ Product Details Size 28" x 32" or 32" x 28" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 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