20" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 21.75] Color_Anodized Aluminum + Product Details Size -

+ Product Details Size - 36"w X 28"h is the size for the duct opening measurement only

these airflow control components provide you with effortless control over your indoor environment

scratch-resistant surface that gleams like it's just been waxed

High Quality – Easy unrestricted airflow for your HVAC system - 7/8" margin turnback

7/8" - 3397 PSI

20" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 21.75] Color_Anodized Aluminum + Product Details Size -+ Product Details Size 20"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" width X 21. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation. Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully shrink