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"] 10in diameter this piece is the perfect

this piece is the perfect touch of class you need to add to your decor

Every grille has a front end frame that will overlap at the wall joint

+ Product Details Size – 10"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 36 5/8" width X 22 5/8" height

Actual Filter Size – 11 3/4"w x 15 3/4" x 1"

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"] 10in diameter this piece is the perfect+ 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