Yamaha YTR-8310 ZS, Bb- Trumpet, ""Bobby Shew"" model, M bore (11.3mm), L-tuning slide, 127 mm bell, ""French bead"" bell edge, Xeno design, Monel valves, Two-piece valve casing, Thinner valve casing pistons, New slide stopper ring on 3rd slide, Longer stopper screw, New valve caps, New finger buttons, Silver-plated, Includes case and mouthpiece