... sale 5.Good OEM service... Backing BearingsThe Sankai Ganghai Co., Ltd. NNCF series of backing bearings of was ... the NNCF series of backing bearings in Sankai Ganghai Co., Ltd. are shown as follows: Tolerance and ... used in 20 high roller, 14 high roller, 12 high roller, 8 high roller and offset 8-high ... thin as 0.005mm. Sankai Ganghai Bearing Manufacture Co., Ltd was the first, and now the largest ...