Crimp/Snap Vials, Caps and Kits | Thermo Fisher Scientific - US 4mL, 15x45mm crimp/snap cap vials and inserts. Superior quality 1st hydrolytic class glass (Type 1) with a 13mm crimp/snap-ring finish; Use with 13mm aluminum Seals or Kim-Snap closures ; Polyspring inserts are self-aligning and provide a cushion against needle contact; National 13mm Crimp/Snap Caps and Septa