Stunningly beautiful BSP Bass Trombone Mouthpiece.
| Model | Cup Dia | Throat | Rim | Comparison |
| MB1BT “The Beast” | 29.0mm | 8.10mm | 6.2mm | Bach 1G/Doug Yeo/KG0D |
| MB1.1BT “Fumeaux” | 28.35mm | 8.5mm | 6.50mm | Rath B1 MF (more funnel shaped) |
| MB1.25BT | 27.70mm | 7.8mm | 6.2mm | Wick0AL/Bach1.25G/Rath B2 |
| MB1.5BT | 27.00mm | 7.43mm | 6.2mm | Wick1AL/Bach1.5/Rath B1/2 |
| MB2G-BT | 26.70mm | 7.15mm | 6.2mm | Bach MV 2G / Schilke 13C4 |
M&B Silver Bass Trom Mouthpieces
£150.15Price