1.Linear Motion Bearing 2.Tolerance:ABEC-1 ABEC-3 ABEC-5 3.ISO ... ,ZZ,RZ,2RZ,RS,2RS SeriesItem NO.Bore Diameter(mm)LM(For Asia use)LM4~LM804~80LME(For Europe use)LME4 ... ,"UU" means rubber seals on the both sides of the bearing; 2,The above serieses including the Standard Type, Clearance Adjustment ... Asian Series,the LMF,LMH and LMK are also available Linear Motion Bearing