4 X 10 Inch Red Oak Wood Flush Mount Louver Floor Register Vent Cover Grille Unfinished by WELLAND, Fits 5/8" Flooring Fits a duct size opening of 4" x 10", Overall dimension is 12.3" x 6.75" x 0.62" Made of Unfinished Solid Grade A Red Oak Wood Thickness: 5/8 Inch (approximate 0.625 inch) Louvered Design with Frame Flush-mount vent sits flush with 5/8-inch hardwood floor