18"w X 18"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: 19.125" X 19.125"] mobile home rv Design – Safety latch for 4 X 12 Is CRFG2028 Width_14in

Design – Safety latch for ceiling installation

+ Product Details Size - 18"w X 28"h X 2"d (for duct opening measurement only)

+ Product Details Size - 34"w X 32"h is the size for the duct opening measurement only

You’ll no longer have to worry about maintaining your line set

+ How To Measure A Round Vent Overall Size:

18"w X 18"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: 19.125" X 19.125"] mobile home rv Design – Safety latch for 4 X 12 Is CRFG2028 Width_14in Design – Safety latch for ceiling installation + Product Details Size 18"w X 28"h X 2"d (for duct opening measurement only)