1. Material: plastic
2. Moderate size, all in control
3. The axis is stable and does not shake at high speed
4. The bearing friction coefficient is small, and the rotation is more durable
5. Round and smooth, no burrs on the edges, no injury to hands
6. A variety of forms, deform as you like, and spin at extreme speed
7. Help relieve stress, exercise thinking and practical ability
8. Size: 7 x 10cm
2. Moderate size, all in control
3. The axis is stable and does not shake at high speed
4. The bearing friction coefficient is small, and the rotation is more durable
5. Round and smooth, no burrs on the edges, no injury to hands
6. A variety of forms, deform as you like, and spin at extreme speed
7. Help relieve stress, exercise thinking and practical ability
8. Size: 7 x 10cm