Our factory are specialized in deep groove ball bearing , such as 60,62,63,68,69 series with open,z,zz,RS,2RS. Usually the bearing are made from Chrome steel with ABEC-1,Z1V1 standard. Also we can manufacture bearing with other material and quaility standard. And we also accept OEM and ODM. So if you have interested in doing business with us, please feel free to contact with me. I am looking forward to hearing from you and sincerely hope that we can build friendship of trade relation in the near future