规格           拉力（他）          价格（元）        单重（KG)

1/2             2                        3.7                  0.33

5/8             3.25                   6.4                  0.63

3/4             4.75                   10                   1.07

7/8             6.5                    14.5                 1.65

1                8.5                    20                    2.29

1-1/8          9.5                    28.5                 3.37

1-1/4          12                     39.5                 4.45

1-3/8          13.5                  53                    6.14

1-1/2          17                    74                     7.8

1-3/4          25                    125                   13

2               35                     200                   20.4

2-1/2         55                     500                   39