6"w X 6"h Extruded Aluminum Adjustable Core Supply Ceiling HVAC Air Grille – Interchangeable: 1-Way, 2-Way, 3-Way or 4-Way - Vent Duct Cover [Outer Dimensions: 7.125" X 7.125"] 10in diameter Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 10" duct openings

+ Product Details Size – 18"w X 14"h is the size for the duct opening measurement only

Built-In Locking System – Comes with a permanently attached eight-tumbler lock and a supplied key for added security

+ Product Details Size - 16"w X 6"h X 2"d (for duct opening measurement only)

our Round Air Vent Supply Grille is the perfect addition

6"w X 6"h Extruded Aluminum Adjustable Core Supply Ceiling HVAC Air Grille – Interchangeable: 1-Way, 2-Way, 3-Way or 4-Way - Vent Duct Cover [Outer Dimensions: 7.125" X 7.125"] 10in diameter Ideal for Walls & Ceilings:+ Product Details Size 6"w X 6"h Is The Size For The Duct Opening Only, Dimensions With Outer End are 7. 125" X 7. 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 a