Thank you for viewing. Regular price: 3960 yen (tax included) Used about 5 times and stored at home. No box or instruction manual. With a moderate weight of 500g, this is a daily arm tightening training tool. You can easily stretch and exercise your shoulders, upper arms, and back with just one tool! It's easy for women to handle, with each weight being about 500g and a diameter of about 13cm, considering the size of a woman's hand. By slowly bending and extending your arms, you can tighten your arms with simple exercises. It's soft and easy to grip, so you can also train your fingers by squeezing and grasping. If you have any questions, please feel free to comment. I work during the day, so I may not be able to reply immediately, but thank you for your understanding.