hplc vial cap

Screw Cap Vials are universal. Screwing the cap applies a mechanical force that squeezes the septum between the glass rim and the cap. Screw caps form an excellent seal and mechanically hold the septum in place during piercing. No tools are required for assembly. 

11mm Snap caps provide a secure seal, minimizing evaporation even with volatile samples, the audible click ensures that a secure seal has been formed and the cap is properly applied. Snap caps have septa pre-assembled, Snap caps are compatible with Aijiren Vials and other snap-ring style vials.