1. Bearing 6000 6200 6300 6800 6900series 2.Inner diameter: 20mm-240mm 3.Precision Grade: P0,P6,P5,P4 ... 4. ABEC-1,3,5,Z2V2 Quick DetailsStructure: Deep GrooveType: Ball..Bore Size: 20mm-240mm mmOutside Diameter: 30 - 400 mmModel Number ... ,UG6900SERIES: 6900-6910 OPEN,ZZ,2RS,NR,UGCSL,SNEN,RKN BEARINGS SPECIFICATIONS1,MATERIAL: GCR15,AISI52100,100GRC2,GRADE:ABEC-1,ABEC-3 ...