.661″ bore = 16,8 mm;Bell: Ø 14 3/8“ = 366 mm;Yellow brass body;Gold brass leadpipe;Nickel silver outer slides;3-valves, Top Action;Stainless steel pistons;Original VINCENT BACH 25 Mouthpiece;Light weight form shaped case with wheels;Weight approx. 5,8 kg;Clear lacquer finish;