根据钢管标准国标对照表，一支121*18重量的无缝钢管价格是多少？
15 18 1.6 2.1 2.6 - - - - 2.9 - - 3.6 - - - 4.5
20 25 1.6 2.1 2.6 - - - - 2.9 - - 4.0 - - - 5.6
25 32 1.6 2.8 3.2 - - - - 3.2 - - 4.5 - - - 6.3
32 38 1.6 2.8 3.2 - - - - 3.6 - - 5.0 - - - 7.1
40 45 1.6 2.8 3.2 - - - - 3.6 - - 5.0 - - - 7.1
50 57 1.6 2.8 3.6 - 3.2 - - 4.0 - - 5.6 - - - 8.8
65 76 2.0 3.0 3.6 - 4.5 - - 5.0 - - 7.1 - - - 10.0
80 89 2.0 3.0 4.0 - 4.5 - - 5.6 - - 8.0 - - - 11.0
90 - 2.0 3.0 4.0 - 4.5 - - 5.6 - - 8.0 - - - 12.5
100 108 2.0 3.0 4.0 - 5.0 - - 5.9 - - 8.8 - 11.0 - 14.2
125 133 2.9 3.4 5.0 - 5.0 - - 6.3 - - 10.0 - 12.5 - 16.0
150 159 2.9 3.4 5.0 - 5.6 - - 7.1 - - 11.0 - 14.2 - 17.5
200 219 2.9 4.0 6.3 - 6.3 7.1 - 8.0 10.0 - 12.5 16.0 17.5 20.0 22.2
250 273 3.6 4.0 6.3 - 6.3 8.0 - 8.8 12.5 - 16.0 17.5 22.2 25.0 28.0
300 325 4.0 4.5 6.3 - 6.3 8.8 - 10.0 14.2 - 17.5 22.2 25.0 28.0 32.0
350 377 4.0 5.0 - 8.0 8.0 10.0 10.0 11.0 16.0 13.0 20.0 25.8 28.0 32.0 36.0
400 426 4.0 5.0 - 8.0 8.0 10.0 10.0 12.5 17.5 13.0 22.2 28.5 30.0 36.0 40.