Airex Balance Beam MiniAirex Balance Beam Mini, 16" x 9. 4" x 2. 4", Blue The Airex Balance Beam Mini is a foam stability exercise trainer that's terrific for balance, stretching, physical therapy, rehabilitation and core strength training. Lightweight and comfortable the beam can be used as a practical replacement for a Pilates role, with the instability of the device even intensifying such exercises. The shape was developed especially for clinical balance and