The Bach LR180S-37 Stradivarius Professional Trumpet is in the key of Bb. Lightweight body, .459 medium-large bore, standard weight 37 bell, 25LR (reverse) mouthpipe, Monel valves, silver-plated finish.Please Note: All Bach trumpets and cornets come with 1st valve slide hook, 3rd valve slide ring, case, and mouthpiece, unless otherwise specified.Key: BbBore: 459-inchLeadpipe: #25LR Reverse TaperLeadpipe Material: Yellow BrassBell: 4.8-inch Standard Weight One-Piece #37 TaperBell Material: Yellow BrassValves: Monel Piston1st Valve Slide Adjustment: Thumb Saddle3rd Valve Slide Adjustment: Fixed Ring with Adjustable Slide StopFeatures: Lightweight Body; Standard Weight BellCase: Deluxe Wood Case with Attached CoverMouthpiece: Bach 7CFinish: Silver