Features Key of BBb4/4 size.728" bore17-1/2" yellow brass bellGold brass mouthpipe3 top-action, nickel plated, nickel alloy pistonsHand-lapped slidesClear epoxy lacquer finishIncludes plastic tuba case and and an all-around mouthpiece Description Product Description This full-sized tuba is ideal for students, particularly those just learning the horn. Its responsiveness assists beginning players in learning phrasing, and its excellent intonation helps foster a feel for correct pitch. 3 top-action, nickel-plated, nickel alloy pistons help achieve fast action. Hand-lapped slides move freely and stay airtight. Its rugged construction assures that it will hold up to the rigors of school use and transport. Key of BBb. 4/4 size; .728" bore; 17-1/2" yellow brass bell; gold brass mouthpipe; 3 top-action, nickel-plated, nickel alloy pistons; hand-lapped slides; clear epoxy lacquer finish.All Yamaha wind instruments come with a limited 5-year warranty.