Gc Vial Caps found in: Combi PAL and GC PAL Liquid Injection Vials and Caps, Minum-Ware® Caps, µLplate® Snap Caps, Mass Spec Certified Vial Kits, 2.0 mL,.. Size, Particle/mL/Vial Mass Spec Vials are available with or without graduated marking spots. are available with or without graduated marking spots.