This product can be given as great gift for your friends and families. They will be very happy. Made of paper material, it is simple and useful. You can to use it. Short test time, this PH test paper is very easy to use and carry, it is convenient for outdoor test. Features - - Material: Paper. - Size: 5.20X5.20X1.30cm/2.04X2.04X0.51inch. - Length: 5m. - The PH test papers are made of , which is and practical to use. - Designed for testing alkaline or acid level with universal range, it is precise and accurate. - Great PH testing paper for laboratory. This test paper should be stored in dry and dark place. - Dip the strip into the measurable solution, take it out half second later and compare with the standard color plate to get the PH value. - Compact and lightweight, roll type, convenient to carry and simple to use this product. Package list: 1 Roll x PH Test Paper