Professional 677H Series Flute Offset G Split E, gizmo key Yamaha 677H professional flutes combine the brilliance of nickel silver keys with the characteristic warm colors of a sterling silver headjoint and body. The headjoint, body and footjoint are all heat treated with Yamaha's proprietary acoustic annealing process to provide an impressive evenness of tone and response throughout all registers. The hand-finished sterling silver headjoint is a modified version of the Type A headjoint supplied with Yamaha handmade flutes. The specially designed cut of this headjoint offers incredible response and an impressive dynamic range.600 series Yamaha flutes boast a 0.43mm wall thickness which, when combined with the hand-finished sterling silver headjoint, provides a remarkably warm and rich tone. Yamaha 600 series flutes come standard with Straubinger Phoenix Pads for a more precise and consistent seal. Straubinger Phoenix Pads allow the flutist to play with a lighter touch and quicker action. The keys feature traditional pointed key arms, reflecting the highest level of craftsmanship and adding visual elegance to these outstanding instruments.