CryoKING 2ml Cryogenic vials, Exteranl Screw Threads , with 2D Barcoded+ side code, self-standing,PP, autoclavable,6 colored caps are available, gamma radiation steriled, DNase & RNase free, endotoxin free, foreign DNA free, 25 Sets/Bag, 40 Bags/Case ( 1000 Sets/Case)