Headspace Vial PTFE Septa 20mm Aluminum crimp caps with GC Septa for gas chromatography instrument. US $7.00-$12.00. 7 YR. Add to Favorites. Aijiren 1.5ml crimp top hplc vials 11mm pp cap w red PTFE white silicone septa glass bottle aluminum cap 11-SP3002. US $4.00-$6.00. 7 YR. Add to Favorites. Aijiren 11mm aluminum crimp cap with ptfe septa for