2 mL capacity with round bottom These vials do not lock into racks or trays Black graduations and larger marking spots for easier filling and sample identification Manufactured from polypropylene to withstand temperatures to -196°C Rubber O-ring for a secure seal Vials may be color coded with inserts (see Cat. No. 430499) Sterilized by gamma radiation Nonpyrogenic and DNase/RNase-free WARNING: Do not use cryogenic vials or Cryogenic Vial Storage boxes in the liquid phase of liquid nitrogen. Only store in the vapor phase above the liquified gas. Always use appropriate safety equipment when removing vials from cryogenic storage.