Trombone Handslide Inner Tubes

Precision drawn nickel silver tube. The tubes are straightened, and plated with hard chrome. 

Stocking Sizes:

.547 Bore = .581 Stocking O.D.  .570 relief O.D.  (fits Bach 42)

.500 Bore = .533 stocking O.D. , .522 Relief O.D. 

.562 Bore = .593 Stocking O.D. , .582 Relief O.D. (fits Bach 50)