I'm selling a wave ring that I just bought recently. It didn't suit me, so I'm putting it up for sale. It's in like-new condition. The Wave Stretch Ring is a self-care and training tool developed based on ergonomics. The double-arch shape of the Wave Stretch Ring is designed to fit perfectly on parts of the human body such as the spine, ribs, pelvis, and soles of the feet. It enables the "loosening" of muscles like never before, and furthermore, it can be used for effective "stretching" through the inner muscles, allowing you to bring out a functional, flexible, and powerful body arch that is natural to humans. *We are the trademark holder of 【Wave Stretch Ring】 (Registration Number: No. 4938341). Please be aware of imitations. Specifications: ■Length 24cm / Width (center) 10cm / Width (sides) 13cm / Height 8cm / Weight 230g Material: ■Polypropylene (Made in Japan)