X pre-slit vial septa with PP caps-Aijiren HPLC Vials Septa. Oct 29, 2021 · Description. Filter Vials 0.2um PTFE w/pre-slit cap. Thomson SINGLE StEP eXtreme Green Cap, 100-pk. Provide multilayer filtration for viscous samples and samples containing up to 30% solid particulates. Allow compounds to be separated from matrix, resulting in both