About Us: We mainly concentrated on designing, Manufacturing and selling of physics toys. Hope our products can bring you endless pleasure.Best Gift: The top is a very meaningful gift, memories of childhood, precious friendship, you can send it as a gift to your friends or relatives and so on.Durable: The silicon nitride bearing in all of our spinning tops offer superior wear resistance. well made, no scratches, no signs of the machine, perfectly balanced.Knurled Upper Top Body: Knurling on the stem allows for a high-torque rip to develop high RPMs at launch, At the same time easier to spin.Spin Long Time: After practicing, a skilled adult could spin it for 3-8 minutes easily. A perfect gift for every spinning top lover.High Performance: this is a terrific looking, high performance spinning top. Launches easily, settles quickly, and spins Quiet smoothly. High Quality: We inspect and test each top carefully (and violence test was introduced too) to ensure you have a good shopping experience. Overall Dimensions: 1.35 inch x1.38 inch(Diameter x High) Net Weight: 1.77oz; Material: 304 stainless steel, silicon nitride ceramic beads Packing List: Spinning top x1