1. Premium Aluminum Alloy: Crafted with high-quality aluminum alloy, this ear equalization training tool is lightweight yet sturdy, offering excellent durability. Its surface is treated with anodization, providing resistance against corrosion and rust for long-lasting use. 2. Enhanced Grip with Grooves: Designed with a specialized groove in the middle, this practing ear pressure balance equipment improves your grip, allowing for a more stable and secure hold during underwater training sessions. Enjoy enhanced control and confidence while practicing your diving skills. 3. Dual Cleaning System: Our innovative design of underwater apnea training tool features a secondary water flushing system at the air intake, ensuring thorough cleaning of the airway. This helps maintain a clean and hygienic breathing passage, promoting safety and comfort during extended diving sessions. 4. Ear Pressure Equalizer: Specifically developed as an aid for free divers, this ear pressure equalizer assists in mastering equalization techniques on land. Improve and fine-tune your ear pressure balancing skills to enhance your performance and comfort during deep dives. 5. Professional Dive Equipment: This versatile ear equalization auxiliary practice tool is an essential addition to any diver's gear collection. Whether you're a beginner or an experienced diver, our product offers the necessary support and practice opportunities to refine your skills and excel in the underwater world. color:Blue/Black/Gold/Red Material: aluminum alloy Package Contents: 1 x Ear Pressure Balance Trainer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.