Holton ST308 trumpet, key of Bb,5" bell, .459" bore, one-piece specially tapered mouthpipe, 1st slide U-hook, reversed main tuning slide with single-radius crook, 3rd valve slide stop, Monel valves, with clear baked epoxy finish. If you enjoy the sweet sounds of Maynard, then this is the horn for you. This medium large bore horn will be great for any jazz soloist wanting to play with tons of expression. Leather carrying case. Used in public once. Excellent condition.