We have just received our first delivery of Best Brass "Groove Series" mouthpieces for trumpet, flugel and cornet. They feature a grooved/rifled throat to creat air speed just as you find in the barrel of a high powered rifle. "Super C" guaranteed with every mouthpiece! (not really). Watch the site for a UK review and more detailed info coming soon or pop in store for trials. Follow this link to the best brass web site for more info in the meantime. Enjoy! http://www.bestbrass.jp/en/mouthpiece/index.html