General description Universal pH Test Paper Rolls are designed for easy and accurate pH measurement. Each roll contains high-quality pH test paper that provides fast results. The compact roll design makes it convenient to use and carry, making it ideal for various applications. Technical specifications pH Range: 0-14 Roll Length: 5m per roll Total Length: 32.8ft (2 rolls) Material: High-quality painting music paper Usage Take out a small test strip. Touch the liquid to be tested with the strip. Wait a few seconds and compare the results with the standard color chart provided.