6901 2RS ceramic ball bearing Material:full ZrO2 ceramic PTFE cage Size:12x24x6mm OEM service Specification :Full ceramic bearing have excellence performance as special electrical and magnetism resisance ... ,PEEK,PI,AISI SUS304,SUS316,Cu,etc. 6901-2RS Full Ceramic sealed Ball Bearing, the inner diameter is 12mm, outer diameter is 24mm ...