Test strips for measuring the pH of a solution in the range of pH 1-14. 50 pcs per pack. Strip length 63 mm. width 5 mm. pH test strips have a padded paper test tip attached to a vinyl stick. Easy to use. provide accurate results in a few seconds. Comes with a color chart. which allows you to visually assess the pH value of a solution: a solution is acidic if pH<7. alkaline if pH>7 and neutral if pH=7.