Features: Multipurpose test strips for fast detection of acidity/alkalinity in solution, soil, cosmetics, and more with 5 pack convenience. double color paper strips (red/blue) clearly display changes between 4.5 8.0 through clear color reaction, housed in moisture proof easy carry packaging. Essential for gardeners, lab technicians, parent testing household products, and enthusiasts requiring precise measurements. Quickly analyze soil quality for plant, check skincares product safety, test laundry detergent effectiveness, or check liquid sample in educational experiments. Tear resistant design enables single hand operate apply 1 drop, observe color shifts within 10 second, and compare with included scale for accurate result. Specifications: Material: Paper Single size: about 9x60mm/0.35x2.36inch Box size: about 15x30x66mm/0.59x1.18x2.59inch reference fluid in pregnant women: fluid is alkaline, with a value between 7.0 and 7.5. If not sure whether the fluid leaks, it is recommended to seek treatments in time. Female : The value of fluid of normal women is less than 4.5, between 3.8 and 4.4, and it is acidic regardless of whether pregnant or not. Human : The value of mixed in health people is between 6.6-7.1 Human urines : The normal ranges is 4.5-8.0, and the normal urines value is about 6.5. Drinking water : value of drinking water is 6.5-8.5, and it can be consumed normally as long as it fall within this ranges . Package Includes: 5 boxes Acid & Alkali Test Paper note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.