To embody the "great cornet sound" that BEST BRASS envisions, this instrument is designed to be slightly heavier. Furthermore, two acoustic slits, which emphasize its unique design, combine sound projection with flexibility. You're guaranteed a rich, long-range sound, as well as a majestic "cornet-like tone." You'll also be surprised by the playing feel, which is unlike anything you'd expect from a heavy-weight instrument. *This product may need to be ordered. Please contact us for detailed stock status and delivery information.BEST BRASS Groove Series Cornet Mouthpiece GP (1x) Rim inner diameter: 17.150mm Cup depth: Very deep Throat diameter: #22 (4.00 mm) Features: For British-style brass band cornet. Beautiful, soft, and sustained tone. For orchestra players who use a TP-1C or similar trumpet and want to switch between trumpet and cornet, this is the perfect choice. Compatible with other companies: DENIS WICK 2 (slightly larger)