John Packer JP331 Rath Bb/F Tenor TromboneWe say: The John Packer range of woodwind and brass instruments is part of our portfolio of instruments for AIMS members. This intermediate level trombone is ideal for any student wanting to progress their playing from the mid to higher level grades. John Packer say: The JP331 Rath represents John Packer's flagship medium large bore Bb F tenor trombone designed and manufactured in collaboration with Michael Rath, one of the UK's leading trombone