Features1[2 packs of 160 tablets] With 2 packs of litmus paper pH value, a gift of 1 x 0.2ml plastic dropper. 80 pieces per pack, a total of 160 pieces. Lightweight, easy to carry and keep. 2[Easy to use and save] The solution to be tested in the middle of the drip test paper, compared with the standard color version (pH value) after half a second, there are simple instructions on the back of each package. The test paper should be stored in a dry place to avoid light, and acid and alkaline air can no longer be stored. 3[PH 1-14] The range of the test paper is 1 to 14, the interval is: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14. 1-3 means Very acidic substance; 4-6 means acidic substance; 7 means neutral; 8-11 means alkalinity; 12-14 means very high alkalinity. If higher accuracy is required, please search for special test strips. 4[Monitor your health] There is a strong correlation between the pH of the human internal environment and the pH. PH test strips can help you stay healthy by testing many everyday substances. 5[Wide application] A wide range of universal test strips for water, saliva, swimming pools, sweat, beverages, skin care, products, lotions, spas, bleach, disinfectants, aquariums, urine, soil, moisturizing soaps, lemon juice, Milk pH test. Very suitable for home, office, work and travel use.SpecificationMaterial: PaperPaper size: 55mm x 9mm (L x W)Each package size: 70 x 45x 5mm (L x W x H)Package List2 Pack pH test pape