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               Originally Posted by 
              Gas_Up_Lets_Go  
              OK, 
              
 
 Upper - 32005J
 Lower - 32006JR
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         Its these numbers you need to quote.
         
        
 The first two numbers tell you what type of bearing - in this case (32) a taper roller bearing. The last two digits multiplied by 5 give the internal diameter of the bearing. Last letters give the seal type/ or any other information that is applicable - in this case can't remember, too long ago!