The 6330S features a .462-inch bore with a lightweight design combined with a Shepherd's crook short-type model to give a more brilliant sound that is favored among soloists. All Yamaha wind instruments come with a limited 5-year warranty. Monel pistons Monel pistons are resistant to corrosion and are an ideal choice for professional cornet pistons which must retain precise fit and smooth action over many years.Hand-lapped pistons and slides Hand-lapping pistons and slides ensures an absolutely perfect fit and seal between the pistons and casings or slide parts. Such a perfect fit helps to achieve smooth air flow and smooth action and improve the response and intonation of the instrument.Pressure-formed tubing Perfectly rounded tubing results in less turbulence and a smoother air flow, thus allowing for an excellent scale and reduced resistance.Laser-fused pluzuma welded bell A high-energy laser fuses the brass together for a virtually seamless bell which allows continuous even vibrations.One-piece, drawn, gold brass mouthpipe This type of mouthpipe offers excellent intonation, response and proper resistance.Lightweight construction The YCR-6330S combines lightweight construction with short-type cornet design to facilitate a relatively brilliant sound favored by soloists.