B&S; 3143/2LR-L Challenger II L, Bb Trumpet, 43 bell shape, Brass body, ML bore: 11.66 mm, One-piece, hand hammered brass bell Ø: 125 mm, Monel valves, Reversed LR mouth pipe, Nickel silver outer slides, Slide stop on the 3rd slide, 2 Water keys, Clear lacquered, Incl. mouthpiece and Prestige case