High quality manufacturing 2ml 9-425 Screw Neck Vial HPLC Vials Caps with Septa. US $5.108-$12.77. 6 YR. Add to Favorites. Aijiren 20mm natural ptfe white silicone septa w 20mm open top aluminum crimp cap. US $11.00-$14.50. 7 YR. Add to Favorites. Supplier Price Seal HPLC and GC Vials 11mm snap cap with PTFE septa in stock.