WedFeir Kinetic Desk Toy Balls, Full Body Optical Illusion Metal Stress Ball, Fidget Spinner Ball Desktop Gyro, Gifts for Adults Kids. ( Sliver )

Specifications: Diameter is about 1.5inch. Materials: aerospace grade aluminum Package Content: 1pcs Kinetic desk toy Weight: 70g Features: At the bottom of the Kinetic Desk Toy Ball, there have an anti-slip silicone mat which can holds the ground tightly at all the time. Dynamic stripe design. Silent Bearing, Sound less than 10 decibels Rotation time is about 3 -5 minutes Precise machined by aerospace grade aluminum and high-quality R188 10 balls bearings Our core technology is to apply the high quality bearing instead of enlarge products size .Apply R188 with 10 pcs balls in bearing. All balls are coved by PTFE and the whole bearing is sealed completely.