Product Description Shape : Triangle Pattern Materail : aluminium alloy Bearing : 608 Hydrid Ceramic Zirconia Bearing(it is better than the 606 high speed bearing Feature: 1. Material is aluminium alloy. 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.
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