Quality tuba with four rotary valves, and nickel-silver mouthpipe and valve casings. Miniball linkage for superior sound and improved feel. The CBB 683-4 is made of yellow brass and has a lustrous clear lacquer finish.Cerveny tubas possess a rich, resonant tone quality, and have excellent projection. These fine instruments exhibit superior workmanship and are known for their excellent finish. Cerveny tubas represent a real value in their price range.Cerveny has been building fine brass instruments since 1842 in Hradec Kralove, Czech Republic. They are world's largest manufacturer of tubas and baritones.