Chlorine dioxide product for on site generation. Kit 2 components Part A chlorite solution mixture of water and sodium, Part B acid citric solution and purified water mixture. 1200 vertical drops per set. Crystal Clear chlorine dioxide kit A and b contains 1:1 Set, 4x 1 oz citric acid, 4 x 1 oz sodium solution NaClO2 set. Always read label and instructions provided PO Box may not be shipped to, provide a physical address for humans. Determine the # ppm of ClO2 per drop (1 drop = 1/20th of ml). *ClO2 should be prepared on site and cannot be stored for long periods of time. Separtely each chemical has a 24 month shelf life.