Tri-Ball Breath Trainer- Manual, flow-oriented breath trainer- Inspiratory breathing exercises- Variable flow rate- Free of latex and epoxy resin- Trainer for proper and good breathing- The Tri-Ball breath trainer is a classic among the manual and flow-oriented respiratory trainers- The three balls in the three chambers make it easy for you to learn to breathe properly and deeply, an essential skill for making music- Deep breathing lets you play even harder pieces with greater ease and and effort