For the first time Yamaha has designed a student trumpet with a
  reversed main tuning slide allowing for an exceptional feel and
  response. The YTR-3335 has the addition of a brace on the main
  tuning slide for a more stable and solid sound. The newly
  designed two-piece yellow brass bell has the perfect parameter
  for the needs of a student. It has a light response and the ideal
  thickness of two-piece yellow brass bell making it easy for
  students to get started and develop a brilliant tone.