Angular Contact Ball Bearing Ball Material Alloy Steel Bearing Industry Number 7001 Bore Diameter 12 mm Cage Material Phenolic Closure Open Contact Angle 15 Degrees Contact Bearing Type Angular Contact Matched Bearing Type Duplex Maximum Speed 44 200 RPM Maximum Temperature 120 Degrees C Minimum Temperature -40 Degrees C Number of Rows One Outside Diameter 28 mm Overall Width 8 mm Ring Material Alloy Steel System of Measurement Metric ABEC Rating 7 Cage Type Stratified