The Fox B Bocal replaces the CVC and CTC bocals. Unlike the T bocal, the Fox B bocal helps favor the lower partials of the bassoon sound to produce greater depth, more power, and a lyrical, dark tone. Fox B bocals are available in lengths 1 through 3, with 1 being the shortest length and 3 being the longest length. The B bocals are manufactured from nickel silver with silver plating.