headspace vials 20 ml online restek-Lab Chromatography Supplier 20 Ml Vial Rack at Thomas Scientific MACHEREY-NAGEL Headspace screw neck vials N 18 are made from 1st hydrolytic class glass More convenient, consistent and safer sealing process compared to crimping (better reproducibility) 10 mL (clear) and 20 mL vials available (clear/amber) Compatible with CTC, Gerstel, Shimadzu and