Specifications: Compact and lightweight round design, easy to use and carry, each roll length is approximate. The pH test paper has a complete pH range, which can measure the pH value of 0 to 14, and the time interval of the pH color card: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, easy to read. Widely used, you can test the pH of any liquid. Using pH test paper, you can measure the pH of human urine, saliva, drinking water, swimming pools, aquariums, hydroponics, aquariums, food, etc. Easy to use: take a small test strip, immerse the test strip in the test solution for half a second, and then compare it with the standard color on the card to get the result. Our pH test paper consists of a 5 meter long roll, which can be measured about 250 times (each measuring is about 2cm). The Scale Reads from 1 to 14: 0 - 3 indicates a very acidic substance. 4 - 6 indicates an acidic substance. 7 indicates neu-tral. 8 - 11 indicates alkalinity. 12 - 14 indicates a very high level of alkalinity. Type: PH Test Paper Quantity: 2 Rolls Measuring Range: pH 1-14 Shelf Life: 3 Years Features: Indicator Paper, Universal, Full Range, Fast Length/Roll: 500cm/197" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Included: 2 Rolls of PH Test Paper