Garibaldi R18 Trombone Silver Plated Single-Cup Mouthpiece Size R18 The Garibaldi Silver Plated Single-Cup Trombone Mouthpiece is the perfect choice for any Trombone player looking to improve their sound. Crafted with precision and attention to detail, this mouthpiece features a unique Single-Cup design that provides enhanced projection, articulation, and tone. Whether you're a professional or a student just starting out, the Garibaldi Silver Plated Single-Cup Trombone Mouthpiece is sure to enhance your playing experience. With its exceptional sound quality and playability, this mouthpiece is an excellent investment that will provide years of reliable and consistent performance. Details: CUP SIZE: GAR-R18, EXT RIM SIZE: 43.43mm, INT RIM SIZE: 22.09mm, THROAT: 4.77mm, CUP DEPTH: Shallow Cup