uxcell 4pcs SG25 U Groove Track Guide Bearing 8x30x14mm U SG25, silver

SG25 Bearing: I.D.=8mm, O.D.=30mm, Thickness=14mm, Groove width=8.2mm, Groove depth=2.25mm. Suffix on the bearing just for differentiating between Sealed and Shield type of bearing. Protect from dirt and debris.Sealed (Designation Suffix RS/2RS) – Made of sheet steel reinforced nitrile butadiene rubber (oil- and liquid-resistant).