1. Material is Stainless Steel/Brass. it has more balance ,it could rotate long time
2.Use the professinal Ceramic Zirconia Bearing .you do not need more any maintain, do not need to add lubricating oil.
3.Wash by water directly .easy way to clear your baby
Package included: 1pcs
Use this Way:
Hold spinner in one hand and use the other hand to spin it rapidly using small continuous strikes to keep it spinning indefinitely with practice, spinners can be spun using one hand only using the fingers of one hand to stop and start spinning