Size: Approx. 2.76''/70mm (L) * 1.18''/30mm (W) * 0.59''/15mm Weight: 4oz Q1: What's the material and which kind of bearing is it? A1: The main material is aluminum alloy for the body. It uses the high-speed steel roll-on bearing in the center and it will spin average for 1 min. Q2: Will it make noises when spinning? A2: It will make a sound unavoidably but not so noisy and nearly everyone can accept it. If you can't accept any noise, it will not be a good choice for you. The hand spinner, a tiny gadget to killing time, it can reduce ADHD, OCD, hyperactivity, anxiety, stress and the like. It will stimulate brainstorming. You can try to think out any cool motion by spinning. (But don't recommend it for newers as it will shorten the life span). For a newer, you will not seize it for first toss, so it's necessary to excercise it more. If it drops, take a sandpaper. Don't clean it with water or the spinning speed will be affected when the water is in the balls inside the bearing. By spinning it, your creativity will be sprung out. It's a good birthday gift, too.
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