WELLAND 4 Inch x 10 Inch Red Oak Wood Vent Floor Register Self Rimming, Unfinished DIMENSION - Fits a duct size opening of: 4" x 10" ,overall dimension is about 6 x 11.25 inch,refer to the detailed description at the bottom of the page. PREMIUM MATERIAL - Made of Unfinished Solid Red Oak;Colors may be a slight different due to screen display difference; Easy to stain and poly DESIGN - Self Rimming vent(aka Insert Vent)sits on the surface of an installed floor; Louvered Wood Design;Drop in floor registers APPLICATION - Wall registers; Wood registers; Air registers; Heat registers; Register covers;Floor vent register WARNING - BEWARE of other sellers selling WELLAND vents. WELLAND vents can only be sold by WELLAND Made of two parts ,Easy to install Red oak wood vents Louvered Wood Design APPLICATION - Wall registers; Wood registers; Air registers; Heat registers; Register covers;Floor vent register Please read the picture carefully Fit for the vents duct opening is 4*10 inch the overall dimension is about 6*12 inch the thickness is about 3/4 inch Measure the size of the duct opening. Do not measure your current floor register. Fits a duct size opening of: 4&#034; x 10&#034; Note:you must measure the size of the duct opening