The Fox T Bocal replaced the CVX and CTX bocal. The T bocal is standard with Renard Artist models 220 and 240 and Fox models 201, II, III, and IV. The T bocal helps favor the upper partials of the bassoon sound to produce greater flexibility and easy, expressive performance, especially in the high register. The T bocals are available in lengths 1 through 3, with #1 being the shortest length. The T bocals are manufactured from nickel silver with silver plating.