... Rollers Bearings 1.GCr15, Gcr15SiMn 2.ISO 9001:2000 3.C0,C2,C3,C4 4.widely used Cylindrical roller ... ,C2,C3,C4 4.widely usedsingle row cylindrical roller bearings, caged ,mainly of the NU,NJ ... NUP and N designs double row cylindrical roller bearings ,caged,mainly of the NNU and NN ... multi-row full complement cylindrical roller bearings, with four or eight rows of rollers Welcome to enquiry and trial ...