Angular Contact Ball Bearing, Bearing Industry Number 3204/5204, Bore Diameter 20 mm, Cage Material Steel, Closure Double Sealed, Contact Angle 30 Degrees , Contact Bearing Type Angular Contact, Lubricant Material Polyrex, Matched Bearing Type Not Matched/Single Bearing, Maximum Speed 9,000 RPM, Maximum Temperature 105 Degrees C, Minimum Temperature -20 Degrees C, Number of Rows Two, Outside Diameter 47 mm, Overall Width 20.6 mm, Ring Material Alloy Steel, Seal Type Contact