16" x 16" Cube Core Eggcrate Return Air Grille Adjustable Return + Product Details Size –

+ Product Details Size – 20"w X 10"h is the size for the duct opening measurement only

Design – Unrestricted airflow for your HVAC system - adjustable one-way louver with full horizontal airflow directional control - single deflection supply grill with 96% airflow - noise free components - no vibrating louvers etc

+ Product Details Size – 10" x 16" or 16" x 10" is the size for the duct opening measurement only

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16" x 16" Cube Core Eggcrate Return Air Grille Adjustable Return + Product Details Size –+ Product Details Size 16" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 17. 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