Greg Black 1-1/2G Heavy Bass Trombone Mouthpiece Large Shank Silver Plated Heavy Weight Cup Inner Diameter: 27.25mm Cup Depth: Deep Throat: Standard ★Only tried once, in excellent condition. Heavy type is a rare item with limited availability. We are currently unable to offer discounts, thank you for your understanding. The short shank and heavy body provide a tight sound. The playing feel is heavy, but it is recommended if you want to increase the resistance of a 1.5G size.