Designed for storing biological material, human or animal cells, at temperatures as low as -196ºC but should be used only in the gas phase of liquid nitrogen. A specifically designed lip inside the cap ensures a positive leakproof seal at all temperatures. A 1 1/4 turn of the cap is sufficient to seal the vial. Closure and vials are both manufactured of polypropylene with the same coefficient of expansion, which ensures an equally secure seal both at room temperature and at low cryogenic temperatures.

Tubes have a white marking area, can be color coded by using a CAPINSERT™ and are compatible with most storage systems. Only the round bottom vial can be centrifuged, and up to 14,000g. Vials are sterilized by gamma radiation and are packaged in unique tamperproof, resealable, safety-lock bags of 100.