The headjoint is an important factor in determining the tone. 300 Series flutes feature a sterling silver headjoint, and a nickel silver body and footjoint. These features combine to provide a flute that offers both durability and a brilliant, singing sound! The YFL-381 features open-hole keys and an in-line G key. Open-hole keys give the player more control over the tone of the flute. Undercut and beveled embouchure hole speicifically designed for a clean attack, sensitive response, and accurate intonation. All key shapes and placement have been ergonomically designed for comfortable, natural-feeling performance. The keys are hand-assembled and adjusted for a perfect 'touch' and balance. Key posts have been thickened and redesigned for improved durability and strength to maintain accurate rod alignment. Double bladder pads for longer life and maximum seating. Neoprene key bumpers are stronger and more durable than cork. Yamaha's unique screw resistance inserts allow smooth adjustments while preventing gradual loosening of the screws.