8. Septa are made of the highest quality materials to ensure proper function and can be pre-slit to ease needle penetration. Application. 9mm screw thread caps and vials are suitable for Aijiren, AB Sciex, Brukers, Techcomp, PerkinElmer, ThermoScientifics, Shimadzu, Waters, CTC autosampler and other rotating or robotic arm samplers and