606952 by NEST Scientific is a 2D barcode externally threaded cryogenic vial (new model), sterile (E-beam), supplied racked. Laser-etched unique 2D barcode on base enables rack-level scanning without vial removal. USP Grade VI PP tube, HDPE cap, rated to −196 °C; certified DNase-free, RNase-free, and human-DNA-free.