These are a typical slotted vent cover. Usually these are made in red or white oak, but we have a wide variety of other wood choices as well. They are made surface mount for existing floors, or flush mount for new flooring. Although we show a variety of standard sizes, we can also make them to fit oddball dimensioned openings, if needed. In addition to traditional dampers, we also provide low profile dampers if your duct opening is shallow. Choose from unfinished, or finished with clear lacquer.