Double Shielded Ball BearingsWhy Choose This:★R144ZZ (I.D.=1/8-inch, O.D.=1/4-inch, Thickness=7/64-inch)★ABEC Tolerance 3 (P6), Z2 Noise Level for most general use★Made from Chromium Steel (GCr15), durability and resistance to deformation under heavy loads★R144ZZ bearings are shielded on DOUBLE SIDES to keep lubricant in★Static load rating of 17N and dynamic load rating of 54N.
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