uxcell Ball Bearing Guide Pulley Roller Round Wheel 8x30x8.5mm Double Metal…
Publisher: uxcell. Chromium Steel long-life bearings, smooth and low noise. 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).