Apr 06, 2021 · 20mm Crimp Caps GC MS Autosampler Vial, Hplc Vial, PTFE . 20mm Alumimum crimp cap with septa PTFE/Silicone, suitable for headspace crim vials for GC /GCMS analysis. Perfectly suitable for gc ms vials price, gc headspace vials manufacturer’ instruments. Magnetic Crimp Cap and Bi-metal Crimp Cap are also available. (2)Packing