... life 2,Competitive price 3,Quick delivery,good service 4,precision precision miniature bearings Applicati on:Remote-controlled cars,bicycles,skateboard,electric ... ,ABEC-7 5,Vibration level codes: V4, V3, V2, V16,Internal clearance codes: C0,C2, C3, C4, C57,Material: AISI52100, AISI440C ...