Angular Contact Ball Bearing Ball Material Alloy Steel Bearing Industry Number 3204/5204 Bore Diameter 20 mm Cage Material Polyamide Closure Double Sealed Contact Bearing Type Angular Contact Lubricant Material SRI 2 Grease Polyrex EM Grease Matched Bearing Type Not Matched/Single Bearing Maximum Speed 12 000 RPM Maximum Temperature 175 Degrees C Minimum Temperature -40 Degrees C Number of Rows Two Outside Diameter 47 mm Overall Width 20.6 mm Ring Material Alloy Steel