4 X 12 Inch White Oak Wood Flush Mount Floor Register Vent Cover Grille Unfinished by WELLAND, 3/4" in Thickness Fits a duct size opening of 4" x 12", Overall dimension is 14.5" x 6.75" x 0.75" Made of Unfinished Solid Grade A White Oak Wood Design Flush-mount vent sits flush with 3/4" hardwood floor Authentic WELLAND Product Made of two parts ,Easy to install Made of Unfinished Solid White Oak Flush Mount with frame Louvered Wood Design floor vent cover Fits a duct size opening of 4&#034; x 12 Overall dimension is 14.5&#034; x 6.75&#034; x 0.75&#034; Flush-mount vent sits flush with 3/4&#034; hardwood floor Please read the picture carefully Beautiful and High Quality. Authentic WELLAND product Measure the size of the duct opening. Do not measure your current floor register. Fits a duct size opening of: 4&#034; x 12&#034; you must measure the size of the duct opening