#TSHJAPAN Shop <--- Click to check out TSH products ☆ This is a core weight training device that uses water. ☆ The 5kg type is for one-handed training. ☆ There are four sizes: 5kg, 10kg, 20kg, and 30kg. 【5kg】 Length: Approximately 30cm, Diameter: Approximately 15cm 【10kg】 Length: Approximately 61cm, Diameter: Approximately 15cm 【20kg】 Length: Approximately 77cm, Diameter: Approximately 18cm 【30kg】 Length: Approximately 81cm, Diameter: Approximately 22cm ☆ Adjust the weight by filling with your desired amount of water according to the markings. Then, inflate with air using the dedicated pump and close the lid tightly. ☆ You can train your core and build muscle using various training methods, such as utilizing the weight of the water or working against the flow of the water. ☆ Water coloring is not included. ☆ It is lightweight and compact when the water and air are removed, making it easy to carry anywhere. ☆ Made of PVC material, it is soft and flexible, but it hardens at low temperatures and may be damaged if excessive stress is applied. Please be careful when storing or using it below freezing temperatures.