Description: 【Package】: Includes 1pcs ear equalization, 3pcs balloons of random colors for practice, and a storage box for easy organization and transport 【Diving Ear Pressure Balance】: Ear equalization training tool, practicing ear pressure balance for freediving/diving spearfishing underwater, can practice ear equalization anytime 【Premium Material】: The freediving ear equalization is made of aluminum alloy, which is sturdy, stable, and long term use 【Lightweight & 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 store 【Widely 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/2.32inch Storage Box Size: 7.5cmx7.5cm/2.95inchx2.95inch Package Includes: 1 Freediving Ear Equalization 3 Balloons (Random Color) 1 Storage Box Note: Please allow slightly errors due to manual measurement and different monitors.