Save $18.00 over the individual item pricing. This complete home colloidal silver production set-up includes all of the following: 27 volt generator, one pair of silver electrodes, one extra positive electrode (the one which is used up after producing about seven gallons of 10 ppm solution), 8 oz. amber storage bottle, 2 oz. amber dropper bottle, Spray cap, Hanna Instruments TDS-1 tester.