WELLAND Hickory Wood Flush Mount Floor Register Vent Unfinished, 3/4" Thickness (4X12 inch) Fits a duct size opening of 4" x 12", Overall dimension is 14.45" x 6.75" x 0.75" Made of Unfinished Solid Grade A Hickory Wood Louvered Design Flush-mount vent sits flush with 3/4" hardwood floor Authentic WELLAND Product duct size opening of 4&#034; x 12&#034; Overall dimension is 14.45&#034; x 6.75&#034; x 0.75&#034; Flush-mount vent sits flush with 3/4&#034; hardwood floor 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