New STERLING SWTM-1023 Bb/F Blue Trombone   This stunning STERLING tenor trombone has an F attachment which lowers the fundamental pitch from B♭  to F by means of an F trigger that controls a rotary valve. The extra F attachment - about a metre in length - is a traditional wrap which is curved and fits inside the main tuning slide. It has a reasonably large bore. Beautifully crafted and finished this horn plays beautifully.  •  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