300ml Liquid Nitrogen Cryotherapy Instrument LN2 Sprayer Dewar Tank & 9 Heads

  

It Is a Good Product Worthy of Your Hand. Phase-change Refrigeration Principle, Relying on the Evaporation Pressure of Liquid Nitrogen, so That the Liquid Nitrogen Infusion Tube from Liquid Nitrogen Flows into the Cold Head Through the Cup, Thus Achieving the Effect of Cryotherapy.