Liquid Nitrogen Cryogenic Device Frozen Head Sprayer Freeze Dewar Tank Portable

  
Liquid Nitrogen Sprayer 300ml Cryotherapy Device Freezing Spray 9 Frozen Heads. 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.