Headspace Vials ND20 and ND18 - Chromatography Accessories. Headspace Vial ND20 clear glass for CTC PAL (Varian, Gerstel, Atas, Shimadzu) TriPlus HS. Product no.: 20090873. Headspace-Vial, ND20, 20 ml volume,75,5 x 22,5 mm, clear glass,DIN crimp neck, long neck, rounded bottom, 100 pieces in re-sealable PP Box. 24.87 € / 100 piece (s) *.