Fox C Bocals are our new entry-level bocal. They are the bocals provided with our Renard models 51, 41, and 222. C bocals are manufactured from nickel silver with silver plating. C bocals are available in lengths 1 through 3, with 1 being the shortest. If you do not know the length you need, the #2 is probably your best place to start. Fox C bocals are popular as a replacement bocal for school use with most bassoons.