Screw Neck Clear Glass 2 ml Vials with PTFE-Silicaon sept Bonded cap. Part No. :- CW101-BS03NS (Non slit) CW101-BS03PS (Pre slit) Size: 2ml 12x32 mm Glass used: Claer Borosilicate Glass USP Type-1 Cap: Blue PP cap bonded with Natural PTFE-Silicon septa.