... ,Ferrum Noise: Z1,Z2,Z3 Vibration: V1,V2,V3 Roller BearingsMarterial: Gcr15Seal material: Rubber,FerrumNoise: Z1,Z2,Z3Vibration: ... V1,V2,V3Clearance: C2,C3,C4Bore diameter 6~60mm<Bearing Type>1) 16000 series: 16001, 16002, 16003, 16004, ... , 6904, 6905, 6906, 6907, 6908, 69097) Inch size series: R6, R8, EE3, EE48) Specifc designed bearings for motorcycle Double row Tapered roller bearings