Precise color matching with the closedValue scale from 1 to 14. Indicator paper with color scale, to measure the pH of your wort.It can satisfy all your needs, matching color is accurate. Super sensitive, provides reliable, highly accurate pH results and a perfect match to the color chart meanwhile. Ideal for pH testing at home, labs or schools. Easy to use, provides highly accurate and reliable pH readings. Very convincing and easy for pH testing at home, labs or schools. 1,2,3,4,5,6,7,8,9,10,11,12,13,14. Specification: Length: 5m Range: 1~14 Specifications: 5m/volume Widely used: monitoring urine, cosmetics, saliva, human body, pH and pH of various liquids. Product Description: Take a strip from the roll and dip it into the solution you want to measure. The color of the strip will change immediately. Quickly match this color with the color chart on the packaging surface to obtain the pH. Do not wait or allow to dry. If the test paper is directly immersed in liquid, indicator on the test paper is easily dissolved in water. After water is diluted, the color displayed is inaccurate. Usage: with a glass rod dipped in a small amount of liquid, smear on the colored end of the test paper, and then compared with the color card to determine the PH value. The number next to the color is your pH. pH scale ranges from 1 (very acidic) to 14 (very basic), 7 is neutral. Material: 1 * pH Indicator Paper