... )3.Atandard bearing material : GCr15_China/(AISI)52100_American/(DIN)100Cr6_Germany(Chrome steel)4.Vibration and noise level: Z1,Z2,Z3,2V2,2V3 ... , AISI440C, AISI304, AISI316...Retainer: PTFE, Nylon, PEEK Or Stainless SteelLubrication: Oil,grease,dryNoise Level: Z1,Z2,Z3,Z4Type: thrust ball bearingPackage ...