Kohlert 110 Series Intermediate Bb Trumpet Silver Key: BbBore: .460-in.Leadpipe: StandardLeadpipe Material: Yellow brassBell: 4.75-in. two-pieceBell Material: Yellow brassValves: Monel piston1st Valve Slide Adjustment: Thumb saddle3rd Valve Slide Adjustment: Fixed ringFeatures: Monel valves, double-braced tuning slide, 3rd valve slide water keyCase: Wood shellMouthpiece: 7CFinish: Silver plate This intermediate silver trumpet features a 460-in medium-large bore, plus a dual-braced main tuning slide to give this trumpet slightly more mass for added projection of sound The Monel valves provide smooth action and the adjustable 3rd valve slide stop insures accurate tuning