Features B&S instruments are known for their excellent acoustic properties, ease of performance, flawless mechanics, and impeccable beauty.The 3137 Challenger I Series Bb Trumpet comes in the key of Bb with a 4-13/16" hand-hammered one-piece bell, .459" medium large bore, Monel pistons, boxed bronze springs, nickel silver outer slides, and 3rd valve slide stop. Includes deluxe wooden case.   Model:3137-S Manufacturer:B&S