<b>Product Specifications</b><br> Size: 2.68*0.7*1.06in/68*18*27mm(Length*Top Diameter*Bottom Diameter)<br> Weight: 0.11lb/48g/pcs<br> Material: Metal<br> Product category: Fidget toy<br> Color: Silver(Moon Edition), Coppery(Mars Edition) and Blue(Earth Edition)<br> Ability training: Intellectual development, active mind, interest culture, <br>parent-child communication, interactive toys, hand-eye coordination, vision training, etc.<br><br> <b>How Moondrop Works</b><br> Let copper slide block move along the magnets.<br> -Go through the magnetic fields;<br> -Induce the current to flow in opposition to the magnetic fields;<br> -Create resistance then slow down the sliding block.<br><br> <b>Package Included</b><br> 1 * Moon Edition Moondrop with Desk Stand <br> 1 * Mars Edition Moondrop with Desk Stand <br> 1 * Earth Edition Moondrop with Desk Stand <br> 100% No-worried Money Back Guarantee. <br><br> <b>Note: </b>There is no direction or manual included in package. <br> Because this toy is easy to play,just let slider ring free-falling or slide the slider ring along with its rod. <br>Or spin it, roll it, slide it, click it and fidget around in any way possible.