Cryo Vials are normally used for storage of Biological material, human & animal cells at temperature as low as -190°C. These sterilized tubes are provided with white, prominent graduations and a long marking area for sample identification. The cap of these vials is provided with a seal ring inside to make it completely leakproof. The longitudinal grooves in the base give a non-twisting feature to these vials when placed in a cryo rack. Material: Polypropylene