Cryo-Alfa Super handheld cryosurgery unit comes complete with one 16g N2O gas cartridge and instructions. Features Level of cold generated by the rate at which the button is depressed. Treatment of various conditions e.g. warts, legions etc Cryo-Alfa-S may also be used for skin lesions; very convenient for GP's Cost per treatment is 50p or less Quick and safe to operate Freezes to -89C to a depth of 3mm Swiss made with appropriate CE mark.