Schilke 60 Silver Plated SP, Large Shank Standard Series Bass Trombone Mouthpiece ★ Cup Diameter: 29.03mm ★ Cup Depth: Deep * Not a long shank ★ Used for about two months after being purchased new. There is some fine wear on the surface, but no noticeable scratches or dents. This model is characterized by a thick and powerful sound, and is a standard model favored by many bass trombone players. Schilke mouthpieces have subtle differences in shape depending on the manufacturing period, but this one is a relatively recent specification.