【HAMMOND DESIGN 11ML】 Hammond Design is a mouthpiece maker founded by Carl Hammond, who originally designed custom mouthpieces for the Silky company. Carl Hammond's mouthpieces are recognized by musicians around the world for their excellent craftsmanship and professionalism. The size is 11ML, with a slightly larger bore than a Bach 4, and a standard cup size. It is for large shank instruments and has a silver-plated finish. It can also be used for large bore euphoniums. There are some scratches and dirt, but there is no damage that would interfere with use.