describe 50 bottles Parameter urine test paper | dipstick test | 50 multi-functional test paper 14-in-1 Test time: 60 seconds Advantages: It has the ability to resist the interference of risk investment Test items: residual chlorine, pH, total alkali, hardness, iron, copper, lead, nitrate, nitrite, bromine, total chlorine, chromium, fluorine, cyanuric acid Scope of application: applicable to drinking water, aquarium, swimming pool and spa, industrial water, pond, hot spring water, bathtub water, agricultural medicine water, residual water of chopsticks disinfectant