</p> CaLeQi kinetic desk balls are primarily used for alleviating stress,<br>helping to concentrate your mind and relax your brain, and more. <br> Our mission is to delivery the most interesting,<br> most pressure-reduced ball toy to office workers, friends, family, students.</p> Material: Aerospace Grade Aluminum<br> Diameter: 38mm<br> Optimal rotation time; 30 seconds<br> Max rotation time: 100 to 180 seconds<br> </p><b>Features:</b></p> Anti-slip mat base, let it close to the ground.<br> Keep silence in rotating<br> Polished surface, with a Better feeling of touch.<br> Alleviate working stress, relax yourself, a good partner on yor desk.<br> </p><b>After-Sales Service:</b></p> We provide Money Back Service, you can enjoy no-hassle and free-replacement guarantee, <br>and quality warranty. Your satisfaction is our biggest goal.</p> </p><b>Note:</b></p> It will probably break glass and it could injure them if it's also thrown.<br> It is not suitable for kids under seven.<br>