Ko te diameter o waho o te ngongo PEEK he 1/16”, e tika ana mo te nuinga o nga mahi tātari chromatography wai. Ka whakaratohia e Chromasir te 1/16 "OD PEEK ngongo me te ID 0.13mm, 0.18mm, 0.25mm, 0.5mm, 0.75mm me te 1mm mo te whiriwhiri a nga kaihoko. Ko te ± 0.001” (0.03mm) te roanga o roto me waho. Ka hoatu he kaitapahi ngongo mo te kore utu ina ota ngongo PEEK i runga ake i te 5m.