... : Rubber,Ferrum Noise: Z1,Z2,Z3 Vibration: V1,V2,V3 Spherical plain bearing Marterial: Gcr15Seal material: Rubber,FerrumNoise: Z1,Z2,Z3Vibration ... , 69097) Inch size series: R6, R8, EE3, EE48) Specifc designed bearings for motorcycle Trailer Spherical plain bearing