Perantucci mouthpieces are known for their slogan "The Right Response".  Made in Germany, they are used around the world by many professional Tuba players.  Their range is based on two shapes, the American funnel style cup and the German round style cup.  These two styles have many variations with cup diameters ranging from 31 mm to 34 mm.  To see the entire range of Perantucci tuba mouthpieces visit their website.