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 evaporation loss of static liquid nitrogen, providing five-year vacuum quality guarantee. 3 The products of this series have the types of transportation、storage、air transportation and large caliber operational; 4 The neck diameters: Ø30、Ø50、Ø80、Ø125、Ø200、Ø216、Ø315、Ø400 ect. 5 The products of this series range from 1L to 1000L, nearly more than 50 varieties. 6 Carrying cart (optional), for convenient move indoors. 7 Liquid nitrogen alarm monitoring liquid nitrogen level or temperature (optional), to enhance the security and reliability of stored samples. 8 Design the professional accessories such as support rack, frozen boxes and frozen pipes according to customers’ different application fields. Specifications: