Features: Universal indicator papers used in scientific experiments and other fields to test the pH of substances. The indicator paper set comes with PH readings ranging from 5.5-9.0For better testing effect, please do not expose the set paper to air or sunlight PH range 5.5-9.0, 80 bars per pack with a clear colored PH scale for comparison application results: flower growing, fish keeping, toiletries and food industry, etc. Usage: Immerse the travel in the solution to be tested for half a second, take out and contrast with the color chart to get PH readingsNote: For better testing effect, please do not expose the paper set to air or sunlight the paper should be stored in a dark, dry place, no moisture can not indicate acid or alkaline solution, when its density was lower than 0.01%. Specifications:PH Range: 5.5-9.0Test Paper Size: Approx. 63x40x3mm (LxWxH) Quantity: 1 Set Note: Please allow 1-3mm error due to manual measurement. Pls make sure you do not mind before you make a bid, due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Content:80 x PH1 Test Papers x Color Arrangement