Headspace Vials . in glass, septa and caps, we developed Verex HPLC / GC vial products with Vial Kit, Crimp Cap, 2 mL Clear + PTFE/Silicone, preSlit. Aijiren Certified Vials, Caps and Septa - Postnova. CombiPAL and GC PAL Liquid Injection Vials and Caps. Clear vials with write-on spot, blue screw caps, PTFE/red silicone septa. 100/pk .