This is a mouthpiece that makes it easier to play high notes because it is slightly smaller and shallower. Schilke Schilke is loved by players of all genres. The inner rim diameter is slightly larger than a Bach 10-1/2. The rim is flat and thick. The apex of the rim is slightly inward and slopes gently towards the outer edge of the rim. The outer edge of the rim is slightly defined, which is a unique Schilke rim design. The outer rim diameter feels about the same as a Bach 10-1/2. Therefore, the mouthpiece has a soft feel and is designed to be less painful and less fatiguing even with hard pressing. The cup is a gentle UV cup shape with a depth similar to a Bach E. The throat just before the bore is slightly wider, and it has a double-cup-like shape, similar to the Stokowski-Vaccaiano model. The throat is #27 (3.66mm). The backbore is about a Warburton 9. The inside of the shank end, about 1.2mm, is finished with a gentle slicing, similar to Schilke 14A4a. This is a mouthpiece with a good response and an edgy sound, yet it resonates with a full and rich tone. Recommended for pop, big band, horn sections, etc. Recommended for piccolo trumpets that require high notes, and for use in concert bands for pop music. - Model Name: Schilke 7B4 - Material: Silver-plated - Size: For Trumpet Thank you for looking. Trumpet mouthpiece Trumpet trumpet mouthpiece Schilke