precision thin section bearing:1,ABEC7 2,High speed 3,End cover:ZZ,RS 4,Noise ... level:Z1,Z2 5,C2,C0,C3.. precision thin ... BoreAvailable as standard in 52100 (100Cr6) and stainless steelFour precision classes from ABEC 1F to ABEC 7FThese sizes available in ... in PTFE, Buna-N-Rubber (contact and light contact). High Performance precision thin section bearing