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"] 14" Diameter Marked circles for cutout

Marked circles for cutout

Actual Filter Size – 27 3/4"w x 9 3/4" x 1"

+ Product Description Upgrade your HVAC system with our 8" Round Air Vent Supply Grille

+Product Details Size – 2"h x 10"w is the size for the duct opening measurement only

+ Product Details Size – 26" x 36" or 36" x 26" is the size for the duct opening measurement only

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"] 14" Diameter Marked circles for cutout+ 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