10"w X 10"h Extruded Aluminum Adjustable Surface Mount Supply Ceiling HVAC Air Grille – Interchangeable: 1-Way, 2-Way, 3-Way or 4-Way - Vent Duct Cover [Outer Dimensions: 11.125" X 11.125"] Supply Grille + Product Details Size –

+ Product Details Size – 8"w X 36"h is the size for the duct opening measurement only

+ Product Description Upgrade your HVAC system with our 5" Round Air Vent Supply Grille

Design - special "V" shaped louvers ensure 100% view block while ensuring easy un-restricted air flow

+ Product Details Size - 26"w X 30"h X 2"d (for duct opening measurement only)

10"w X 10"h Extruded Aluminum Adjustable Surface Mount Supply Ceiling HVAC Air Grille – Interchangeable: 1-Way, 2-Way, 3-Way or 4-Way - Vent Duct Cover [Outer Dimensions: 11.125" X 11.125"] Supply Grille + Product Details Size –+ Product Details Size 10"w X 10"h Is The Size For The Duct Opening Only, Dimensions With Outer End are 11. 125" X 11. 125". Design Re configurable Interchangeable Sections Easily convertible into 1 Way, 2 Way, 3 Way, or 4 Way Just lift sections and rotate to re configure direction. High Quality Aluminum The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant, beautiful, and smooth surface, adds