Alibaba vial septa with PP caps-Aijiren HPLC Vials Septa 2021 - 08 - 07 Standard Opening 2ml HPLC Vial with Cap for. Aijiren pp caps for 2ml 9-425 screw-top vials with caps lined with PTFE/Silicone septa are used in chromatography analysis, it can be used