... 4.Spec: Inch and Metric Linear bearing SHENGYUE The best choice Good ServiceLinear bearing informationThe linear bearing, linear motion of a low-cost ... steel Gcr15 and Carbon steel CageBrass, SteelTolerance RatingABEC-1,ABEC-3,ABEC-51) Linear Bearing type:LM30UU2) ID30, OD 45, 3) ... Material: GCr 15 ,4) Shield/closure: seals5) Tolerance: ABEC-1 (P0), ...