● Made of medical grade polypropylene

● Can be repeatedly frozen and thawed

● Universal screw threads for use

● Tubes fit most common rotors

● Tubes fit standard 1-inch and 2-inch freezer boxes

● Autoclavable to 121°C and freezable to -86°C

● 81-0055 0.5ml self-standing vials are brown, and can fit 81-0006 brown caps

● DNase & RNase free, endotoxin free, heavy metal free, and human DNA free