The JP135 is John Packer�s Bb valve trombone. Ideal for valve players who want to dabble with a trombone without learning slide positions, the JP135 features a 12.30mm bore, an 8� bell and nickel silver valves. The JP135 Bb also has applications for pit players where playing space needs to be kept to a minimum. This eye catching trombone is sure to turn heads and is a fun addition to players� instrument collection.