The Black Beauty Bottle Capper is basic but a dependable capper that has a magnet to hold the cap in place while you crimp the cap to the bottle. It works with any standard American bottle cap and capper. Crown Oxygen Caps have a barrier that contains an oxygen scavenging agent and helps to prevent oxidation. Fits 12 oz and 22 oz beer bottles and 750 ml and 187 ml champagne bottles.