608 Hybrid Ceramic Bearings with size 8*22*7mm ,the inner ring and outer rings are with material Chrome steel and the balls are made of ceramic ZrO2 or Si3N4 ,this bearing have a high precision, free in spin and competitive price .
608RS 8x22x7mm bearings for fidget spinners with Chrome steel rings and ceramic balls ,can free spin with 2-3 min ,free sample can provide before order .
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