Septa Vials – Walmart. Membrane Solutions 100pcs 9-425 Screw Top Vial Caps 9mm PTFE/Silicone Septa Vial Cap Crimp Top 20mm Aluminum & Hole PTFE/Silicone Septa for 6/10/20mm. 9-425 HPLC Red White 9mm PTFE Silicone Septa – Aijiren. Using for 9-425 HPLC vials, for some famous instruments. · Good sealing ability, corrosion resistance. · PTFE