Description: This item is made of premium material, which is safe and practical to use. The pH level test papers are especially designed for testing alkaline or acid level. 0-14 design is precise and accurate. Great and precise PH testing paper. This test paper should be stored in a dry and dark place.Features-Color: As shown.- Material: Paper.- Size: 7x0.5x0.01cm.- Made of high quality, you can get an accurate result.- Very simple operation steps, no other auxiliary consumables are required.- Dip the strip into the measurable solution, take it out half a second later and compare with the standard color plate to get the PH value.- This test strip is not suitable for acid and alkali solutions with a very weak buffer solution box concentration below 0.01%.- This test paper should be stored in a dry and dark place.