Bb/C Trombone from the TB650 series suitable for children. This instrument features Dual bore .500“ / .525“ = 12,7mm / 13,34mm, Yellow brass bell 8“ = 203,20 mm, Hard chrome-plated nickel silver inner slide, Nickel silver outer slide, Hand rest, individually adjustable, Clear lacquer finish, Original VINCENT BACH 12C mouthpiece and slide grease, Light weight case with rucksack assembly.