Description: 1.High-strength aluminum alloy structure or stainless steel, for stable performance and easy to operate. 2.High vacuum multi-layer insulation design for less daily static evaporation loss of liquid nitrogen, providing five-year vacuum quality guarantee. 3.The products of this series have the types of transportationíóstorageíódry shipper and large caliber operation; 4.The neck diameters: ª+30íóª+50íóª+80íóª+125íóª+200íóª+216íóª+315íóª+400 etc.. 5.The products of this series range from 1L to 1000L, nearly more than 50 varieties. 6.Carrying cart (optional), for convenient move. 7.Level Monitor for Liquid Nitrogen monitor liquid level of liquid nitrogen or temperature (optional), to enhance the security and reliability of stored samples. 8.Design the professional accessories such as support rack, freezing bottle and freezing pipes according to customer's different application fields.