Designed for short- and long-term storage of samples and cells. Vials are made from virgin polypropylene resin for purity, clarity, and consistency. Vials are available with internal or external thread. The internal thread format features a silicone gasket and is ideally suited for storage in the vapor phase of liquid nitrogen, at temperatures from –196 to 121°C. Vials are nonpyrogenic and RNase- and DNase-free to <0.06EU/mL. All vials are supplied with caps. Each case includes cap inserts.