VWR 10mm septum cap distributor-Aijiren HPLC Vials. 10mm chromatography vial septa on stock VWR-Aijiren HPLC. Septa for 8-425 Screw-Thread Vial Caps, Thermo Scientific. Description: Coring-resistant, 8mm septum is made of pure white silicone laminated to 5mil red PTFE. For multiple injection applications.