Elkhart 100TBB Bass TromboneCupronickel Slides The cupronickel slide and bell body are used to extend the lifetime of the instrument and to prevent corrosion to the instrument. This is particularly important on the slide where any damage can restrict its playability. Perfect for Beginners The Elkhart 100TBB is the perfect instrument to begin learning the brass trombone. Its easy playability and accurate intonation make it an ideal instrument without a huge price tag. The slide