Cartridges suitable for Cryo Ideal devices 8gr N2O Cartridges 8gr or 10ml liquid N2O with 65 bars of pressure per cartridge which can reach up to 10 treatments per cartridge. These cartridges come in packages of 20 pieces per box 16gr N2O Cartridges 16gr or 21ml liquid N2O with 65 bars of pressure per cartridge which can reach up to 20 treatments per cartridge. These cartridges come in packages of 10 pieces per box 23gr N2O Cartridges 23gr or 32 ml liquid N2O with 56 bars of pressure per cartridge which can reach up to 30 treatments per cartridge. These cartridges come in packages of 10 pieces per box