This step-up trombone is a collaboration between John Packer and the trombone guru Michael Rath that includes a .562 bore, 80:20 brass construction, double adjustable rotors and a JP pro case.
From the original JP231Rath .525 bore straight tenor to the JP332ORath .547 F attachment, the quality mixed with the John Packer price point has enabled dealers and band directors throughout the US and the rest of the world to get students into a great horn at a great price point.