12"w X 12"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: 13.125" X 13.125"] Compatible with Duct 8" The ring base allows installation

The ring base allows installation without removing the thermostat

+ Product Details Size - 10"w X 16"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 4" duct openings

Full Control – Full 190 degrees control of air direction vertically & horizontally

rattle free airflow for your air-conditioning and heating system as well as smooth opening and closing back dampers

12"w X 12"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: 13.125" X 13.125"] Compatible with Duct 8" The ring base allows installation+ Product Details Size 12"w X 12"h Is The Size For The Duct Opening Only, Dimensions With Outer End are 13. 125" X 13. 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