16"x 16"Stamped Face Steel Return Grille Vent Cover White Poweder Coating Without Frame Outside Dimension 17.75"x17.75" Actual outside overall dimensions is

Actual outside overall dimensions is 9

The Listed size 24"x10" is for inside duct opening measurement

more secure installation

If your duct opening size is 14” x 6”

Distance between the centers of two screws is 14

16"x 16"Stamped Face Steel Return Grille Vent Cover White Poweder Coating Without Frame Outside Dimension 17.75"x17.75" Actual outside overall dimensions isThe Listed size 16"x 16" is for inside duct opening measurement, actual outside dimension is 17. 75"x17. 75" Stamped Face Steel Construction with 1 2" fin spacing for high air flow Screws are included for easy installation White Powder coating with matte finish