Benefits: Every order of certified vials, caps, and septa comes with a test certificate that confirms product specifications. Custom design is available. Wide Opening 9-425 Screw Thread Vials. Part No. Unit Description. 2ML-9-V1001 100pcs/pk 2mL, Clear Glass, 12x32mm, Flat Base, 9-425 Screw Thread Vial. 2ML-9-V1002 100pcs/pk 2mL, Clear Glass