Cryogenic vials 1. Made of medical grade polypropylene material, the tube is highly transparent and easy to observe the sample; 2. 0.5ml, 1.5ml, 1.8ml/2ml cryovial tube 3.5ml self standing cryovial sterile are available in various specifications; 4. Cryo Tubes with Screw Caps, and body are sealed with silicone ring to ensure the integrity of the seal under various conditions; 5. Easy to identify and distinguish individual cryopreservation tubes, white marking area and clear scale to facilitate user marking and calibration capacity; 6. DNase/RNase free, No pyrogen; 7. Withstand -196°℃~121℃, safe storage under the condition of liquid nitrogen phase.