Great for use in the field, the John Packer JP2057 Sousaphone will fit incredibly well within any marching band, Trad Jazz band or even an early big band. You will find that with complete ease, the sousaphone can turn from a mellow bass instrument, to a roaring forward facing monster, suitable to blast any bass line that is needed. Specifications: Model: JP2057S Key: BBb Bell Size: High Grade Brass 660mm (26") Valves: Piston 3 Bore: Large 17.44mm (.687") Water Key: Lever 1 Body: High Grade Brass Finish: Silver Plate Lyre Box: Yes Mouthpiece: Yes Leadpipe: Removable 3-part leadpipe Supplied with: The JP2057 Sousaphone is supplied with a high quality, protective hard case, with plenty or firm padded blocks to ensure that the instruments remains secure in the case. It also comes with a mouthpiece and a basic maintenance kit containing valve oil and tuning slide grease.