No.              Tube                 Thread                      No                  Tube                 Thread
                     O.D                     End                                                  O.D                     End
                      mm                    PT                                                    mm                     PT

1                      4                       1/8                           9                       12                       3/8
2                      6                       1/8                           10                     15                       3/8
3                      6                       1/4                           11                     15                       1/2
4                      8                       1/8                           12                     20                       1/2
5                      8                       1/4                           13                     20                       3/4
6                      10                     1/4                           14                     25                       3/4
7                      10                     3/8                           15                     25                        1
8                      12                     1/4