[size]The test strip size 55mm x 9.0mm / 2.20" x 0.35"the pH test range 1-14 [1- 14 pH test paper]each pH strip is made of good quality litmus paper, won't bleed like normal litmus paper, can get fast, accurate and reliable results in just seconds [Full pH range] it can test from 1 to 14, pH 1-14 color chart for you quickly compare the test results with the 4 colors pH panels on the card board, to obtain your solutions' pH [Easy to apply]to test the pH of a solution, you simply dip the pH strip into your solution, and the strip will change color immediately [Accurate measurement]There is a strong correlation between the pH of the body's internal environment and pH paper help you to maintain good healthy body by testing many usual everyday substances, including moisturized soap, lemon juice, milk, liquid detergent, moisturized soil, saliva, urine, sweat...etc Buy it with