New STERLING Bb/F Blue Trombone   •  Brand new •  Suited for the beginner to intermediate player •  Perfect new condition, and never played •  Plays in key of Bb, with F key trigger attachment                        •  Bell diameter is 232mm (9") •  Standard medium-bore of 0.525" •  Made of solid polished instrument brass •  Finished with quality gloss blue lacquer •  Inner slides are chromium plated •  Outer slides are made of nickel silver •  Quality standard mouthpiece •  Engraved with unique serial number for security and insurance •  Ballistic nylon protective case with soft plush interior •  Cleaning cloth •  Seven day satisfaction guarantee •  Twelve month warranty