26" x 28" or 28" x 26" Cube Core Eggcrate Return Air Grille Insulated Line Set The permanently attached eight-tumbler lock

The permanently attached eight-tumbler lock with a supplied key adds an extra layer of security

Installation Location – Sidewall and ceiling

+ Product Details Size - 25"w X 26"h is the size for the duct opening measurement only

Design – These Supply Diffusers with integral round necks are recommended for heating

+ Product Details Size - 30"w X 25"h is the size for the duct opening measurement only

26" x 28" or 28" x 26" Cube Core Eggcrate Return Air Grille Insulated Line Set The permanently attached eight-tumbler lock+ Product Details Size 26" x 28" or 28" x 26" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27. 75" X 29. 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