1 5 ways test kit 2 test"PH, CI, BROMINE" 3 for chlorine content test 4 refill set for 5-way test kit Item :swimming pool water test kits for refilling Description:refill set for 5-way test kitpackage BU,BL.SW,PBH 20' container:23571 40' container:49286 swimming pool water test kits for refilling