Fits 12x12 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 13.75"W X 13.75"H (12" W x 12" H Duct Opening) Constructed with steel with step

Constructed with steel with step down structure

Distance between the two screw holes is 13

The Listed size 14"x24" is for inside duct opening measurement

•Stamped face steel construction with 1/2" fin spacing for high air flow

Can place them in vents on floor

Fits 12x12 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 13.75"W X 13.75"H (12" W x 12" H Duct Opening) Constructed with steel with stepThe Listed size 12"x12" is for inside duct opening measurement, actual outside dimension is 13. 75"x13. 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