Molchanovs Equalization Tool - The EQ Trainer is an amazing way to work on your equalization even when the water is miles away. Strengthen, stretch and train the glottis and soft palate muscles.
 
Details and Materials
Material: High-density polyethylene
Comes with two balloons
Technical specifications
Length: 4.5cm (1.8in)
Color: Blue , Pueple , White , Pink
Weight: 11g (0.4oz)