8" x 8" Steel Fixed Bar Return Grille - Sidewall and Ceiling 18" Round Duct Pipe with actual outer dimensions of

with actual outer dimensions of 12

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

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

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8" x 8" Steel Fixed Bar Return Grille - Sidewall and Ceiling 18" Round Duct Pipe with actual outer dimensions of+ Product Details Size 8"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 2" wider. High Quality High quality steel with counter sunk screw holes (screws included) and no sharp edges. Installation Location Sidewall and ceiling. Design Heavy gauge steel. Heavier gauge than needed, built for durability and long life in mind, and yet lightweight and easy to handle. Noise free components no