Backun FatBoy (Buffet Size) Clarinet BarrelVersatility defined The Fatboy is at home in the world's most prestigious concert halls, famous jazz clubs, and everything in between. It's our best selling barrel, and for good reason. Artists who are called upon to interpret a wide variety of music appreciate the Fatboy Barrels unique flexibility and versatility. Note: In Japan, this model is known as the Backun Barrel. Specs: Grenadilla or cocobolo wood. Compatible with Bb and A clarinets.