Features: Ensures your pool balance with our high precisions 3 in 1 test strips, designed for quick and accurate water quality measurements. Our test strips offer a triple function formula to simultaneously assess frees chlorine, and total alkalinity, with easy to read color change for hassles frees monitoring. Suit for all pool owners, from residential backyards to hotel leisure facilities and fitness clubs, these strips is suit for maintaining safe swimming conditions. Whether you're enjoying a day in your private outdoor pool or managing a public indoor swimming facility, our test strips help you keep the water inviting and hygienic. With a convenient pack of 50 durable strips, our product is effective, making it essential tool for regular pool maintenance. Specifications: Size:Approx.3.6x9.6cm/1.42x3.78inch Weight:31g Package Includes: 1 Bottle Test Strips note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.