The Cryo-Cyl series of liquid cylinders are designed to be the most durable, economical, and user friendly means of transporting your cryogenic industrial gases. Low Pressure (22 psi) Stainless Steel Liquid Nitrogen Supply Tanks provided needed supply of Liquid nitrogen as a Cryogen for long term storage of samples in cryogenic freezers or as a supply for the controlling of temperature during the freezing process utilizing controlled rate freezing equipment.