deep groove ball bearing/groove ball bearing 1.types:63series,62series,69series,60seriesetc. 2.Material:GCR15 chrome steel deep groove bal bearing/groove ball bearing1.types:63series,62series,69series,60seriesetc.2.Material:GCR15 chrome steel3.shield:plain(open),Z,ZZ,RS,2RS,etc.4.precision lever:ABEC-1.ABEC-3,ABEC-5Our Main products:1.wheel bearing&wheel bearing kits2.deep groove ball bearing3oil ...