These precision litmus paper test strips provide an easy and affordable way to test pH levels across a wide range of solutions. Each booklet contains 80 individual strips calibrated from 1 to 14 on the pH scale, allowing for accurate measurement of acidity and alkalinity. Whether testing pool water chemistry, soil nutrients, cosmetics, or other household products, these strips are a convenient tool for any application requiring pH measurement. Just dip the small strip into the sample and compare the color to the color-coded scale - results appear instantly. An essential testing kit for labs, classrooms, homeowners or hobbyists, this value pack will meet all your pH testing needs for many tests to come.