?Made of medical grade polypropylene; can be repeatedly frozen and thawed
?Multiple threads for super sealing performance
?Thickened tube wall (explosion proof) and cap for safe sample storage
?Black graduation printing and white writing area
?DNase & RNase free, endotoxin-free, foreign DNA free
?Working temperature: stable from -196??C to 122??C
?Suitable for liquid nitrogen freezing (gas phase)