The i33 series is a professional Bb trumpet designed in collaboration with Schilke international artist Osamu Takahashi. Created upon the success of the Schilke i32 model, the i33 shares the same medium-large bore and overall design and a reverse leadpipe as the i32. The i33 also features  a #3 bell taper to produce a more efficient and focused sound due to a slightly larger throat bell for a big sound.