6" x 6" Cube Core Eggcrate Return Air Grille Filter Grille 75" width X 21

75" width X 21

+ Product Details Size – 18" Corner Baseboard Grille - White - HVAC corner vent cover

these grilles ensure easy

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only measure the "hole" in the wall/duct

6" x 6" Cube Core Eggcrate Return Air Grille Filter Grille 75" width X 21+ Product Details Size 6" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 7. 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 electric bills and