T310 - CRYOVIAL® External thread with silicone washer seal. Certified RNAse, DNAse, DNA and Pyrogen freeDesigned for safe storage at temperatures as low as -196 °C (but should be used only in the gas phase of liquid nitrogen). Autoclavable at 121°C. Sterilized by gamma radiation and packaged in unique tamperproof, resealable, safety-lock