Arnolds&Sons 12C mouthpiece for small 3B bore
If you need a mouthpiece that matches an instrument with a small 3B bore, the Arnolds&Sons 12C is a focused option. This silver-coloured model is specified as suitable for a small 3B bore, so the fit matches that sizing.
The shank start measures 10.65 mm, the shank end 12.5 mm, and the shank length 38 mm. With a mouthpiece, these dimensions matter because they determine how it fits onto the instrument and help you choose the correct size.
Sizing and practical use
The Arnolds&Sons 12C is especially useful if you search by bore size and shank dimensions rather than by model name alone. The combination of 10.65 mm at the start, 12.5 mm at the end and a 38 mm length makes it easier to check whether this mouthpiece suits your setup.
If you want to compare your current mouthpiece with the stated measurements, that is often the quickest way to find a suitable replacement in practice. At Magna Music, you can also ask staff who are musicians themselves for targeted advice on the right fit.
