Thank you for viewing! Pocket Trumpet, reliable Jupiter SPT-416, Key: B♭, Bore size: ML, Bell diameter: 11.7 Amado key: Normal. Jupiter's spring diameter is thicker and shorter than other companies, making it less prone to breakage. Pistons are smooth. After pre-treatment, lacquer stripping with solvent, stitch processing, brush-up satin finish, and rust prevention spray. Produces a thick, core-filled tone without pitch deviation. Great for cool performances in band scenes! That's the concept! The dedicated case has no problems and is compact, making it easy to carry. The mouthpiece is standard and versatile. Includes a mute. Soaked in baking soda and citric acid solution, then washed with a wire brush and neutral detergent to remove mold and dirt. Ready to play upon arrival! A cool, jazzy pocket trumpet. Thank you!