Schilke Symphony D6.0 SP Bass Trombone Mouthpiece Silke Symphony D6.0 Silver Plated Cup Diameter: 29.03mm Throat: "O" (.316") Shank: Large Backbore: Large Schmidt ★Purchased new in January 2025, only tried once, in excellent condition. Suggested Retail Price: 30,800 yen (tax included) The Symphony D6.0 has the same rim diameter as the standard model 60, but with an extremely large cup shape, providing depth and clarity of sound, and stability across the entire dynamic range. While maintaining the original rim diameter, the blowing feel is slightly more open than the standard Schilke 60.