Osqi - 14-in-1 water quality test strips for testing drinking water and well water to detect residual chlorine, alkalinity, hardness, pH, nitrite and

Tinor - 14 in 1 Water Quality Test Strips for Drinking Water and Well Water Testing, for Residual Chlorine, Alkalinity, Hardness, ph, Nitrite,

Memkey - 14-in-1 water quality test strips for testing drinking water and well water to detect residual chlorine, alkalinity, hardness, pH, nitrite