Fits 14x20 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 15.75"W X 21.75"H (14" W x 20" H Duct Opening) actual outside dimension is 21

actual outside dimension is 21

To make sure you get the right size

The Listed size 14"x 2" is for inside duct opening measurement

White powder coating with matte finish

The Listed size 16"x8" is for inside duct opening measurement

Fits 14x20 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 15.75"W X 21.75"H (14" W x 20" H Duct Opening) actual outside dimension is 21The Listed size 14"x20" is for inside duct opening measurement, actual outside dimension is 15. 75"x21. 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