Floor registers can be found everywhere. But often stores only carry a very narrow range of sizes of floor registers. This site has perhaps the largest selection of different styles of floor registers of any place. Plus, if you are unlucky enough to have an extremely unusual dimension duct opening this floor registers company may be able to accomodate you with custom sizing. They are also able to make custom dimension flanges on some model floor registers. Most floor registers are made of metal or wood. Typical wood choices for floor registers are white oak, red oak, maple, cherry, hickory, bamboo, walnut, and many others. Metal choices for floor registers are cast bronze, cast aluminum, stainless steel and regular steel, polished or antique brass, brushed nickel, and others.