Quality material: the flow ring toys is made of quality stainless steel material, odorless and non-toxic, sturdy and durable, the surface is smooth and no pointed edges, fine workmanship and quality material allow it to be applied for years Size details: the size of each magic flow ring is approx. 12 cm or 4.72 inches, the flow ring can be folded and stretched, equipped with a black bag for carrying out easily, so that you can share the fun anywhere, anytime Easy to play: you just need to put the bracelet through your wrist, then swing your arms up and down and the bracelet slides free, it can move along your arms and can be passed from one arm to another or to a friend's arm, effortlessly rolling down Nice gift choice: this 3D arm spring can create your imagination with a variety of gameplay, effectively reduce your stress and anxiety, which can be shared as a nice present for your family and friends to show your care Highly recommended for people over 14 years old Multi purpose: this interactive ring is suitable for most people, such as students, office workers, artists, game lovers and some people under pressure, they can add some interesting elements to your ordinary life and help you pass the boring time