This is a unique stretching tool created by the fitness club Tokyu Sports Oasis, featuring two rows of connected balls. It's reversible, with blue and gray colors. When used while lying on your back, the balls aligned in two rows along the spine press against the back muscles, relieving muscle stiffness. Furthermore, the balls fit into the space between the shoulder blades, allowing you to stretch while widening the shoulder blades to the left and right. It can also be connected vertically and horizontally, and can be folded, rolled up, or wrapped, allowing for flexible shape changes, enabling various stretches and exercises. It can be used on the floor or on a chair, making it convenient for multitasking. It comes with an easy-to-understand exercise guide with photos, supervised by Oasis trainers. 【Materials/Components】 ・Body: Polyester, PVC ・Balls: EVA 【Size】 ・Approx. 52cm (length) x 22cm (width) x 7cm (height) (per piece) ＜When connected vertically＞ ・Approx. 99cm (length) x 22cm (width) x 7cm (height) ＜When connected horizontally＞ ・Approx. 52cm (length) x 40cm (width) x 7cm (height) 【Weight】 ・Approx. 0.6kg 【Contents】 ・Main body x 2 ・Instruction manual ・Exercise guide I purchased this from TV Tokyo Shopping in February 2025 and used it only once. I am selling it because I no longer use it. Thank you.