This Free Chlorine Test Paper Strip analyzes free chlorine levels in water, making it ideal for testing pool water, cleaning water, and more. It measures total available chlorine from 10-2000ppm and produces results in just seconds. The reliable and economical test paper comes in a 7MM x 5M roll, making it easy to use and store. Get a rapid quantitative detection of chlorine-containing water today! Features: - Analyzes Chemical Factors: Free Chlorine. - This Free Chlorine Test Paper provides a simple, reliable, and economical means to measure the concentration of free available chlorine in water after using sanitizing solutions. - The Chlorine Test Paper measures total available chlorine from 10-2000ppm, and give results in just seconds. - Rapid quantitative detection of chlorine-containing water such asl water, pool water and household cleaning water. Specifications: Material: Paper Size: 7MM * 5M Package included: 1Roll x Free Chlorine Test Paper Strip Notes: 1. Manual measuring, please allow 1 ~ 3mm error,thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.