18"w X 18"h Extruded Aluminum Adjustable Core Mount Supply Ceiling HVAC Air Grille – Interchangeable: 1-Way, 2-Way, 3-Way or 4-Way - Vent Duct Cover [Outer Dimensions: 19.125" X 19.125"] return grille + Product Description Improve your

+ Product Description Improve your HVAC system with our high-quality

+ How To Measure A Grille

Horizontal performance assures confident use of cooling temperature differential of 30 degrees Fahrenheit and greater

actual front end outer dimensions are approximately 16 5/8" width X 38 5/8" height

Aluminum Garage Door Air Vent Grille Register - With Damper Control Lever For Winter & Summer Settings - With Insect Net Prevent Guard [17

18"w X 18"h Extruded Aluminum Adjustable Core Mount Supply Ceiling HVAC Air Grille – Interchangeable: 1-Way, 2-Way, 3-Way or 4-Way - Vent Duct Cover [Outer Dimensions: 19.125" X 19.125"] return grille + Product Description Improve your+ Product Details Size 18"w X 18"h Is The Size For The Duct Opening Only, Dimensions With Outer End are 19. 125" X 19. 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