Universal pH Test Paper Strips pH Test Strips Roll pH Measure Full Range 014? 164 ftRoll 4 Rolls

The meaning of pH 0 to 14: pH < 7 is acidic, pH = 7 is neutral, pH > 7 is alkaline; The smaller the number, the stronger the acidity; The larger the number, the stronger the alkalinity. Wide application: Great teaching supply for lab, school, to test the solution of acid and alkali; Testing your hydroponic plant growth environment; With your children do some science experiments about acids and bases to rich scientific knowledge; Also apply to testing household items, fish tank, aquariums, etc. How to use: Simply tear off a small portion of the strip press it to the object or liquid you are testing; A few seconds later, take out the paper and using the color chart, compare the color change of the paper to find out the pH level of your testing subject. Package includes: 4 Roll pH test strips