Hearkening back to Vincent Bach’s early 192’s New York designs, Artisan mouthpieces combine the playability of Bach’s Classic inner cup dimensions with the softer rim designs and greater outside mass of his early mouthpieces. These mouthpieces come standard with a 24 backbore and a 27 throat. Both of these design elements significantly differentiate the response and sound clarity of the Artisan series from the Classic Series. Bach Artisan Trumpet Mouthpiece, 1.5B. Cup Size 1.5B, Cup Depth Medium Deep, Cup diameter 17mm.