Chrome steel balls Material: chrome steel/aisi52100/suj-2/100cr6 Size: 0.5mm~3mm Grade: g5~g1000 Hardness: hrc60-66 Certifications: iso9001, ts16949, iso14001 Feature: excellent surface quality, superior wear resistance, high hardness and high load bearing capacity Application: bearing, ball screw, linear motion guide, automotive parts, chemical, food processing, ink and paint grinding, caster wheel, slide rail bicycle and car