... ,Ferrum Noise: Z1,Z2,Z3 Vibration: V1,V2,V3 Spherical plain bearing Marterial: Gcr15Seal material: Rubber,FerrumNoise: Z1,Z2,Z3Vibration: V1 ... ,V2,V3Clearance: C2,C3,C4Bore diameter 6~60mmType>1) 16000 series: 16001, 16002, 16003, 16004, 16005, 160102) 60 ... , R8, EE3, EE48) Specifc designed bearings for motorcycle Trailer Spherical plain bearing