Gauge  Renk         Kateterin İç çapı-Dış çapı (mm)     Kateterin Uzunluğu (mm)         Sıvı Akış Hızı (ml/dk)

14G TURUNCU               1.6   -   2.1                                            45                                                 240

16G         GRI                              1.3   -   1.7                                         45                                         180

18G        YEŞİL                       0.9   -   1.3                                         45                                       90

20G         PEMBE                         0.8   -   1.1                                         32                                       60

22G     MAVİ                       0.6   -   0.9                                         25                                          36

24         SARI                       0.5   -   0.7                                         19                                       20

26         MOR                       0.4   -  0.6                                         19                                             13