This Bearing Has Two Rubber Seals (2RS), Connected to the Inner Ring to Protect the Bearing from Dust or any Possible Contamination. Bearing is Pre-Lubricated with High-Quality Grease ideal for use in High and Low-temperature settings (-20C to +160C). If your Application Requires a Ball Bearing with One Shield or Opened Without Shields, you can easily remove one or both Shields. - Specification: Item 608-2RS, Bearing Type Deep groove ball bearing, Bore Diameter 8.00 mm, Outside Diameter 22.00 mm, Width 7.00 mm, Dynamic Load Rating Cr 3450 N, Static Load Rating Cor 1370 N, Limiting Speed 38000 r/min, Clearance Normal, Tolerance Inner Ring 0 to -8 μm, Tolerance Outer Ring 0 to -9 μm, Tolerance Classes P5, Noise and Vibration Z1V1, Closures Two Rubber Seals (2RS), Lubrication Type Grease Shell RL2, Lubrication Temperature -20°C to +160°C, Rolling Element Indicator Ball, Material Gcr15, Product Weight 0.012 KG.