Jupiter JTR710 Bb Pocket TrumpetJupiter JTR710 Bb Pocket Trumpet JTR710 Features Tuning: Bb Bore: 11,70 mm Bell: 123 mm lacquered, brass Valves: stainless steel, internal valve springs Leadpipe: lacquered, brass Thumb rest at 1st valve slide Pearloid finger button inlays Mouthpiece Jupiter moulded case Thanks to its big bell, the Jupiter JTR700 pocket trumpet far outclasses other, traditional offerings you may have tried. It produces a powerful sound for its size. Many trumpet