The DW/Paxman range of mouthpieces has been developed with LSO principal horn Tim Jones, and uses the ideas underlying the Denis Wick Heritage range. This principle is based on a late 19th century design, where the cup wall is very thin near the mouthpiece rim, combined with the new idea to have substantially more mass lower down the cup. The results are amazing. The mouthpieces have an immediate, easy response, particularly in the high register, a smooth legato and a sound rich in overtones over the whole range. The 5.5, the most popular size in the range, is a good all-rounder. It is perfect for beginners and skilled players alike. Big and bold professional tone quality. Cup Diameter: 17.40mm Rim width: 4.30mm Bore: 4.50mm Backbore: V-type