16 IN 1 WATER TEST KIT Hofun water test strips are equipped with 16 main functions, including: PH, mercury, lead, iron, copper, total alkalinity, hardness, nitrite, nitrate, bromine, free chlorine, total chlorine, fluoride, chromium/Cr, carbonate root, cyanuric, covers the main influencing factors which pollute the quality your swimming pool, hot tub or drinking water. ADDITIONAL ACCESSORY &; EASY OPERATION The Hofun spa test kit is gentle enough to be equipped with a dropper and a dropper. test tube, which would avoid water pollution and make operation easier. WIDE USE WATER TEST KIT Hofun 16 in 1 water test strips can be applied to a wide range of water inspections, such as drinking water, swimming pool, hot tub, spa, pond, aquarium, industrial waste water, etc. < /p> MOST ACCURATE &; SCIENTIFIC WATER TEST STRIPS Hofun specializes in testing &amp; measuring area for years and adopts the most reliable tapes on our products to ensure accuracy in water quality testing. PERFECT VALUE FOR YOUR MONEY - Hofun water test kits for drinking water are absolutely economical, which will last 6 months if tested twice a week. It's also time-saving with convenient use. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference of light and d 'display, there will be a certain color difference, depending on the physical object received Delivery quantity: (according to the main picture)