DIMENSION - Fits a DUCT SIZE opening of: 8" x 10". The Overall size of the flush mount register INCLUDING the frame is: 11" x 13". Flush-mount vent sits flush with 3/4" hardwood floor. The frame is tongue and groove structure for easy installation. PREMIUM MATERIAL - Made of Unfinished Solid Red Oak wood, Select Grade Wood. DESIGN - Flush Mount with frame; Slotted Wood Design floor vent, Horizontal slots which are stronger. APPLICATION - Wall registers; Wood registers; Air registers; Heat registers; Register covers; Ceiling Registers