BearingsWhy Choose This:★R168ZZ (I.D.=1/4"mm, O.D.=3/8mm, Thickness=1/8"mm)★ABEC Tolerance 1 (P0), Z2 Noise Level for most general use★Chromium Steel long-life bearings, smooth and low noise★r168-2z bearings are shielded on BOTH SIDES to keep lubricant in★Static load rating of 31 newtons and dynamic load rating of 71 newtons.
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