Key : Bb Pitch : 440/442 Hz Body : Dalbergia Melanoxylon, Natural African blackwood, selected Bore : Poly-cylindrical Tenons : Metal-capped Barrels Bb : 2.55" and 2.59" Keys : 19 Rings : 6 Thumb rest : Adjustable Eb lever : Included Low F correction key : Included Keywork finish : Silver plated Keywork and mechanics : Forged keys, copper and silver Springs : Blue steel Pads : 100% waterproof material (GT), leather and natural cork