• puncture/rupture-resistance polypropylene construction
• silicon lid seal & patented lid with ergonomic 1.5 twist to open and close
• printed writing area and graduations
• sterile, non-pyrogenic and non-cytoxic inner resealable packs of 50 vials, complete with traceable sterility certificate
• recommended for mechanical freezers and vapor phase LN2 (-196°)
• autoclavable
• disposable