DescriptionThe PH level test papers are made of premium material, which is safe and practical to use. Designed for testing alkaline or acid level with 0-14 range, it is precise and accurate. Great PH testing paper for laboratory. This test paper should be stored in a dry and dark place.Features-Color: Assorted color. -Material: Paper. -Size: 10.5x4x4cm. - Made of paper, you can get an accurate result. - Very simple operation steps, no other auxiliary consumables are required. - Dip the strip into the solution, take it out half a second later and compare with the standard color plate to get the PH value. - This test strip is suitable for use in laboratory. - This test paper should be stored in a dry and dark place.