2 Pcs 6203-2RS Double Rubber Seal Bearings 17x40x12mm, Pre-Lubricated and Stable Performance and Cost Effective, Deep Groove Ball Bearings. Specifications Features Contact Seals Bearing Type Standard DGBB Weight 0.068 Kg Dimensions Outside Diameter D 40 mm Bore Size d 17 mm Outside Ring Width B 12 mm Rs - Min fillet radius 0.6 mm Basic Load Ratings Cr - Dynamic Load Rating 9.95 kN C0r - Static Load Rating 4.75 kN Factors Grease Reference Speed 20000 rpm Oil Reference Speed 24000 rpm Tmin - Min operating temperature -40 °C Tmax - Max operating temperature 120 °C