Cerveny tubas are known for a beautiful sound, smooth action rotary valves, and professional performance at a modest price. The 686-5PRX Symphony II is no exception. It features a larger .795-.835-inch for a big sound, a 17.7-inch bell with a nickel-silver bell wreath for added projection, and a nickel-silver leadpipe. In addition, nickel-silver slides provide a smooth moving feel that will not get stuck.The Cerveny"s have always been known for their beautiful sound and excellent rotary valves. These fine instruments from middle Europe are easy to play and lightweight compared to other brands of tubas. Though well designed and sturdy, a hard case is recommended to keep the horn playing well for many years.