Universal pH testing: pH test strips made from litmus paper ideal for testing fluids in the home, laboratory, schools and for hobbies. With a colour table for comparing pH values. VERSATILE TEST STRIPS: the pH strips have a wide range of application for testing acidity and alkalinity. Ideal for testing saliva, drinking water, aquariums, hydro cultures, food, soil, rinsing liquids, soap etc. EASY TO USE: Hold the litmus test strips in the fluid you are testing. After about 15 seconds, check the result and compare it to the pH colour palette. QUICK RESULTS: The test strips deliver reliable results in the pH range 0-14 within seconds. PRACTICAL ROLL: The indicator strips come in a roll from which the desired number of strips is imply pulled off.