5/4 rotary BBb.
The B&S 3198 is a 5/4 size BBb Tuba features 4 rotary valves with the 3B linkage system. 3B ball bearing linkages on both ends of the valve connecting arm provide the ultimate in smooth and quiet operation. It has a .748â?? bore (4th valve: .787â??), a bell diameter of 18.898â?? and a height of 38.976â??. It is constructed of gold brass and boasts a clear lacquered finish. Gig bag included