JPRath 331, medium/large bore .525, less than 1 year old. Condition is pristine and the slide is super slick. Sounds great, too ! But don’t take my word for the quality and craftsmanship in this instrument. Google it . Particularly check out JPRath Trombone Review by Trombone Ensemble and hear for yourself .While aimed at the top end of the student market this 'bone punches above it's weight and compares very favourably with the Bach Stradivarius 36B. With a RRP of $2999, this is great value for money.