Yamaha YBB-631s Professional TUBA in MINT shape. Has never been played or used. Comes with original hard shell case which also has no damage or blemishes on it. Mouthpiece has also never been used. Silver plated. Features: Monel pistons are resistant to corrosion and are an ideal choice for professional baritone pistons which must retain precise fit and smooth action over many years. This instrument has gone through the Hand-lapping process which is a time-consuming finishing process which results in superior valve fit for noiseless, responsive action and easy tone changes. It also achieves the perfect balance between airtightness and smooth action. The compensating system found on the YBB-631S ensures accurate tuning on all notes throughout the instrument’s range – particularly in the difficult low range.