Design According to the international standard design Suitable for storing 0.5mL, 1.0mL 1.5mL and 2.0mL cryogenic vials tubes and microtubes High transparent cover for easy observation of sample changes Internal unique design, convenient sample positioning Characteristic Made of high strength polypropylene, repeated freeze-thaw and long-term storage of samples This product can be used in ultra-low temperature refrigerator Tolerable temperature range: -90℃ to 121℃ Resistant to alcohol and other mild organic solutions The unique gap and line design is conducive to the rapid cooling of samples and rapid liquid discharge