All glass vials are clear borosilicate Type 1 glass 40mL in volume (27.5mm O.D. x 95mm H), and use a 24-414 closure. All vials are barcoded. The vial caps can be either 1-piece Open Top polypropylene with PTFE septa ultrasonically bonded (not glued), or a 2-piece Open Top polypropylene cap with pressure fitted PTFE septa.