Schilke 14A4x mouthpiece for cornet, piccolo-trumpet. Based on the popular 14A4a and 14A4, this moutphiece was also developed for use with the Schilke piccolo trumpets. The "x" backbore both improves the ease of playing and opens up the sound for the piccolo trumpets. Inner diameter 17,09mm. This also is available as astandard mouthpiece only with the cornet shank.