Cryo vials are designed for storage of samples as low as -196°C*. DNase, RNase,and Pyrogen-free. Radiation sterilized. Polypropylene vials include a cap embedded with a non-toxic silicone O-ring for a secure seal, a large white frosted labeling area, and silk screen graduations. Star base and round base vials have an internal U-shaped bottom. *Not recommended for use in the liquid phase of liquid nitrogen, Can be used in vapor phase of liquid nitrogen. Additional Info: Cryo Vial Interal Threaded, Sterile, Pp, 1.8 Ml Round Base, Pk/500 Package Size(L x W x H): 12 X 12 X 6 (IN) Categories: Vials, Cryo HTS Code: 3926.90.9910 UNSPSC: 4.11218e+007 Country Of Origin: INDIA