... ,C2, C3, C4, C56.Material: AISI52100, AISI440C, AISI304, AISI316, Ceramic7.Retainer: PTFE, Nylon, PEEK Or Stainless Steel8.Bore Size:from 1mm ... codes: C0,C2, C3, C4, C5Material: AISI52100, AISI440C, AISI304, AISI316...Retainer: PTFE, Nylon, PEEK Or Stainless SteelLubrication: Oil,grease,dryNoise Level ...