Description: Package: Includes 1pcs ear equalization, 3pcs balloons of random colors for practice, and a storage box for easy organization and transportDiving Ear Pressure Balance: Ear equalization training tool, practicing ear pressure balance for freediving/diving spearfishing underwater, can practice ear equalization anytimePremium Material: The freediving ear equalization is made of aluminum alloy, which is sturdy, stable, and long term useLightweight & Tiny Size: Diving scuba ear equalization measures 5.9cm/2.32inch, storage case size 7.5cmx7.5cm/2.95inchx2.95inch, Light in weight and compact in size, easy to carry and storeWidely Used: Freediving ear pressure balance is a practical auxiliary practice tool, very suitable for beginner and professional divers, and underwater sports, scuba diving or diving Specification: Material: Aluminum Alloy, Rubber Size Chart: Length: 5.9cm/2.32inchStorage Box Size: 7.5cmx7.5cm/2.95inchx2.95inch Package Includes: 1Freediving Ear Equalization3 Balloons (Random Color)1Storage Box Note: Please allow slightly errors due to manual measurement and different monitors.