... range :605-6020 ,623-6220 ,6300-6320 ,6403-6413 3) Material: Gcr15 (Chrome steel) -China, (AISI) 52100- ... .Z1V1.Z2V2.Z3V3. 6) Precision level: ABEC-1, ABEC-3, ABEC-5, ABEC-7. 7) Brand: KMY, We also ... have ability to produce your own brand or ... other famous brand (SKF, NSK, FAG, HCH, KG, KOYO brand, etc.) 3. The company promises ...