China manufacturer high precision stainless steel deep groove ball bearingsStainless Steel Bearing rings and rolling material with stainless steel AISI SUS440C(domestic number:9Cr18Mo,9Cr18) by vacuum quenching and tempering treatment, cage, and ring frame material AISI304 stainless steel (domestic number:1Cr18).Compared with ordinary stainless steel bearings bearing steel, a stronger anti¬rust,anti¬corrosive, choose the right lubricant, dust cover, etc, can be used in an environment ¬60℃~+300℃′s Click more: www.xzbearings.com/en/china-manfuacturer-high-precision-stainless-steel-deep-groove-ball-bearings-20.html