The Meinl Weston 4460 Series 6-Valve 6/4 F Tuba was developed in cooperation with Stefan Heimann, Principal Tuba with the Staat Sorchester Stuttgart. The 4460 features a .767-inch primary bore and a .846-inch 4th thru 6th valve bore. The design of the 4460 offers five plus one valve fingering with a second left hand lever for slide adjustment. The 4460 also features a 16.5-inch bell. The Meinl Weston 4460 Series 6-Valve 6/4 F Tuba is available in lacquer (4460) or silver (4460S) finish with or without deluxe engraving. Case NOT included.