Bearings Insert High precision insert bearings could be made of material of Chrome steel and Stainless steel. Standard products are: 1) ABEC-1 or ABEC-3 quality grade 2) Black oxided or Zinc plated( race super-finished) 3) High & Low temperature 4) For application of food & beverage industry 5) Metric and Imperial available 6) OEM or customer drawing accepted. Trademark: SZR Model No.: UC/UK/HC/SB/SA/SER/SC Company: Xinhengyi Bearing Co., Ltd.