XLKJ Universal 5 Meters Health PH Indicator PH Litmus Test Paper Strip Roll Full Range 0-14, 16.4 ft/Roll

Product details Features: Size: Diameter: 2.24inch; Thickness:0.55inch; 5 meter/16.4ft roll with 200 tests at 2.5cm per. The meaning of pH 1 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. 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 suitable for testing household items, fish tank, aquariums, etc. Instructions: Take one strip from the roll and dip it into the object or liquid you are testing; Strip color will change immediately. Quickly match this color against the color chart on the surface of the pack to obtain the PH. Specification: Color:Yellow Size: Diameter: 2.24inch（5.6cm）; Thickness: 0.55inch（1.3cm）; 5 meter/16.4ft roll with 200 tests at 2.5cm per. Package Included: 1x Roll PH test strips