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 (-30C to +180C) If your Application Requires a Ball Bearing with One Shield or Opened Without Shields, you can easily remove one or both Shields. - Specification: Item 6303-2RS, Bearing Type Deep groove ball bearing, Bore Diameter 17.00mm, Outside Diameter 47.00mm, Width 14.00mm, Dynamic Load Rating Cr 14300N, Static Load Rating Cor 6550N, Limiting Speed 11000 r/min, Clearance CN, Tolerance Classes P5, Cage Metal, Closures Seal on both sides, Lubrication Type Grease Chevron, Lubrication Temperature -30°C to +180°C, Rolling Element Indicator Bal,l Material Gcr15, Product Weight 0.120 KG.