WHEATON | Vial GuideScrew Caps. 22. Racks. 23. Serum / Crimp Vials and Bottles. 24-25. Serum Vial Closures. 26-27. Crimpers & Decappers. 28-30. Uni-Dose & Vacule Vials.Vial Caps, Hawach septa and cap for crimp top sample vials provide the tightest seal