Type:n, nu, nj, nup, nnu, and nn type Precision:p0 p6 p5(abec-1, abec-3, abec-5) Cage types: brass or steel Material: chrome steel gcr15 Hardness:hrc 60-65 Service: oem service accepted, replacement of skf, fag. Nsk, lyc zwz, ntn, koyo, iko Welcome to contact us at anytime, thank you! Packing: according to customer requests