MACHEREY-NAGEL. 11 mm crimp neck vials and caps commonly used in GC and HPLC and suitable for almost all autosamplers Magnetic crimp closures available for CTC GC PAL or equivalent autosamplers. Vial Kits contain 100 Vials and 100 closures in a drawer-like box which is stackable, chemically resistant and. Compare this item.