Features: 1. QUICK TESTING: Place a drop of the liquid to be measured on the PH test strip, and the result appears after half a second. 2. WATER QUALITY MONITORING: Measuring water samples is one of the most common indicators for water quality testing. The PH value required for drinking water is generally between 6.5 and 8.5. 3. MAKEUP MEASUREMENT: Skin is slightly acidic, and prolonged use of alkaline cosmetics tends to dry out the skin, so cosmetics are best if they have a pH value between 4 and 6. 4. SOIL PH MEASUREMENT: This test strip can also be used in agriculture, forestry, and construction to measure the pH of soils, such as soil nutrients for planting flowers and plants. 5. 100 STRIPS: A total of 100 PH test strips in one box will meet your long-term measurement needs and water quality monitoring requirements. Specification Item Type: PH Test Paper Material: Paper Package List 1 Pack of PH Test Paper (100 strips)