B&S Challenger II Custom Professional Bb Cornets have boxed springs, monel pistons, hand-hammered one-piece bell, gold brass bell, gold brass leadpipe, nickel silver outer slides, triggers on 1st and 3rd valve slides, waterkeys on 3rd valve slide and main tuning slide.Features: Bb "Bronchon Shepherd Crook" Cornet .462"/11.73mm bore 4.921"/125mm bell 1st & 3rd slide triggers Gold lacquer Single case