The Weril J981 Series 4 Valve 4/4 BBb Tuba features a .730 to .768-inch dual bore with 4 top action piston valves plus an 18-inch upright bell designed for outstanding resonance and tone. The J981 is a perfect choice for an upper level middle school or high school ensemble looking for a quality tuba. The Weril J981 Series 4 Valve 4/4 BBb Tuba includes a wheeled molded plastic case and mouthpiece and is available in lacquer (J981L7) or silver (J981S7) finish.