Fits 8x18 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 9.75"W X 19.75"H (8" W x 18" H Duct Opening) The Listed size 24"x14" is

The Listed size 24"x14" is for inside duct opening measurement

Our plastic sidewall/ceiling register is made of ABS plastic in bright white

If the hole is 25" wide by 16" tall

If your duct opening size is 10” x 6”

Butterfly damper with easy foot operated control dial for desired air flow

Fits 8x18 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 9.75"W X 19.75"H (8" W x 18" H Duct Opening) The Listed size 24"x14" isThe Listed size 8"x18" is for inside duct opening measurement, actual outside dimension is 9. 75"x19. 75" Stamped Face Steel Construction with 1 2" fin spacing for high air flow applications. Screws are included for easy installation White Powder coating with matte finish Individually packed with cardboard box for ultra protection