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                | Tungsten 
                  carbide pellets -->> 
                  Bearing steel Ball |   
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                | Bearing steel ball: |  
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                      |  Diameter (d)  |  Diameter (d)  |  
                      |  Inch  |  Millimeter  |  Inch  |  Millimeter  |   
                      |    | 2 |    | 8.5 |   
                      | 3/32 | 2.381 | 11/32 | 8.731 |   
                      |    | 2.5 |    | 9 |   
                      |    | 3 | 23/64 | 9.132 |   
                      |    | 3.1 | 3/8 | 9.525 |   
                      | 1/8 | 3.175 | 13/32 | 10.319 |   
                      |    | 3.5 | 15/32 | 11.006 |   
                      | 5/32 | 3.969 | 7/12 | 11.113 |   
                      |    | 4 | 31/64 | 12.303 |   
                      |    | 4.5 | 1/2 | 12.70 |   
                      | 3/16 | 4.763 | 9/16 | 14.28 |   
                      |    | 5 | 9/32 | 15.81 |   
                      |    | 5.5 | 5/8 | 15.875 |   
                      | 7/32 | 5.556 | 11/16 | 17.463 |   
                      | 15/64 | 5.953 |    | 18 |   
                      |    | 6 | 23/32 | 18.256 |   
                      | 1/4 | 6.35 | 3/4 | 19.05 |   
                      |    | 6.5 | 25/32 | 19.844 |   
                      |    | 7 |    | 20 |   
                      | 9/32 | 7.144 | 27/32 | 21.431 |   
                      |    | 7.5 | 7/8 | 22.225 |   
                      | 5/16 | 7.938 | 31/32 | 24.606 |   
                      |    | 8 | 1 | 25.4 |  |  |  |  |