Greg Black 1G Light Bass Trombone Mouthpiece Large Shank Silver Plated (SP) Lightweight Cup Inner Diameter: 29.00mm Cup Depth: Deep Throat: Standard ★Mint condition, only test-played once after purchasing new. The lightest weight model from Greg Black, the Light weight. The weight with the best response. It produces a slightly brighter tone, and is also recommended for those who are active in solos and ensembles. It has a good grip and a stable feel in the mouth.