20pcs U608ZZ Nylon Pulley U-Groove Ball Bearing 8x30x10mm Roller Wheels
Product Details1.Both sides are shielded to keep lubricant and protect from dirt and debris.2.Bearing steel(GCr15) and nylon races, high hardness, and great wear resistance, showing stable performance and lasting service life.3.U608ZZ Bearing: I.D.=8mm, O.D.=30mm, Thickness=10mm, Groove width=6mm, Groove depth=2.5mm.4.ABEC3 precision for smooth operation and accurate linear motion guidance.5.Precision bearing fits for the rail track system. Suitable for 3d printers, aluminum doors and window, sliding barn doors, pulleys and drawers, household appliance, etc.