1 WP 4.5 fl. oz. and 1 citric acid liquid 4.5 fl. oz. This water purification kit is the new protocol for activating the 28% sodium chlorite with 50/50 percent citric acid solution (premixed) to make chlorine dioxide in only 20 - 30 seconds. For hiking and camping where you need to purify the drinking water. It is approved Geneses 2 Church for treating all water supplies.