Fits 16x8 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 17.75"W X 9.75"H (16" W x 8" H Duct Opening) The Listed size 12"x 12"

The Listed size 12"x 12" is for inside duct opening measurement(duct hole)

Individually shrink wrapped with card board pad in the back for protection

Individually shrink wrapped with card board pad in the back for extra protection

Independent cardboard packing for extra protection

This product has listed size 12“w X 4”h is for duct opening measurement only

Fits 16x8 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 17.75"W X 9.75"H (16" W x 8" H Duct Opening) The Listed size 12"x 12"The Listed size 16"x8" is for inside duct opening measurement, actual outside dimension is 17. 75"x9. 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