HAMMOND DESIGN 4ML Hammond Design The rim is firm, providing a great sense of security when applied. It also gave the impression of producing a thick, solid sound. It's generally in good condition, but there is a slight distortion on the junk end (I think I accidentally bumped it somewhere). There are no other scratches or dents that would interfere with playing. Custom mouthpiece designed and crafted by Carl Hammond, who has a background as a custom mouthpiece craftsman at the Silky company. With a wide variety of lineups and high manufacturing technology, it is used by players around the world, including John Hagstrom, a trumpet player with the Chicago Symphony Orchestra. Cup Inner Diameter: 16.7mm Model: 4ML Similar rim products from other companies: Schilke 14・15 / Bach 1-1/2 ML...Standard cup. A bowl-shaped model with an open throat entrance. Throat #26 with an open backbore type.