Alto saxophone Julius Keilwerth ST 90 Seria IV
- bell diameter: 133 mm
- weight: 2.6 kg
- range from low Bb to upper F#
- plastic holder for the thump, adjustable for angle and height
- key with pearl imitation inserts
- B-Bb-C#-G# mechanism
- octave mechanism
- easy to use
- removable spring
- easy to repair
- includes: soft bag, mouthpiece, reed, wipe cloth