Total Length - 691mm. Genuine Yamaha Trombone Inner Hand Slide Leg Bore. 525. This is for Yamaha Trombone models YSL-356GU, YSL-356R, YSL-445G, YSL-445GE, YSL-446G, YSL-446G, YSL-446GE, YSL-456GJ(2), YSL-630, SL-640, YSL-645, YSL-645E, YSL-645S, YSL-645SE, YSL-646, YSL-646(2), YSL-646E, YSL-646S, YSL-646SE, YSL-683, YSL-683G, YSL-684, YSL-684G.
