... Shield3.Tolerance codes: ABEC-1, ABEC-3, ABEC-5, ABEC-7,ABEC-94.Vibration level codes: V4, V3, V2, V1 5.Internal clearance codes: C0,C2 ... MR.R,67,68,69...Precision Rating: ABEC-1,3,5,7,9Seals Type: Open,Teflon Sealed,Rubber Seals,2 M ... ringApplication: Remote-controlled cars,bicycles,sk...Vibration level codes: V4, V3, V2, V1Internal clearance codes: C0,C2, C3, C4, C5Material: AISI52100, AISI440C, ...