Features:Comes in a nice plastic box that's easy to cary aroundAppropriate for testing alkaline or acid level of any liquidUniversal pH paper is also great for Science Education, great product to have in every lab and at home to measure and inspect water quality, urine, saliva, soil, alkaline diet, aquariums and morePH wide range 0-14, 100 strips per pack With distinct color PH scale for result comparisonsThe test strip color changes must be matched with the pH scale color chart within about 15 seconds0 - 3 indicates a very acidic substance4 - 6 indicates an acidic substance7 indicates neutral8 - 11 indicates alkalinity12 - 14 indicates a very high level of alkalinityUsage: test liquid ready, take out a test paper, the 2 color blocks all immersed in the liquid, after 1 seconds to take out, in contrast to the color of the color reading value in 30 seconds Note:Can not indicate the Acid or alkali solution when its density was lower than 0.01%.Keep dry for the rest paperPlastic Box Size: 6.7x8.7x1.1cmQuantity: 1 Set/100 Strips Note:Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bidDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank youPackage Contents:1 Set x PH Test Paper1 x Plastic Box