With this bottle of PH paper, you can easily test the water quality of swimming pool or other places.<br/>Features:<br />Tests for free chlorine, bromine, pH, total alkalinity, and total hardness .<br />Test at both ends of pool twice a week for be-st results.<br />Packed in a portable bottle, convenient for use and carry.<br />A perfect hepler to easy understand your water quality in 5 main indicator.<br />50 pcs per bottle for long time use.<br/>Specifications:<br />Quantity: 50pcs<br />Item size (bottle): 100 * 45 * 45mm / 3.94 * 1.77 * 1.77in<br />Item weight: 32g / 1.13ounce<br />Package size: 110 * 50 * 50mm / 4.33 * 1.97 * 1.97in<br />Package weight: 42g / 1.48ounce<br/>Packing List:<br />1 *  Bottle of PH Paper Tests for free chlorine, bromine, pH, total alkalinity, total hardness and cyanuric acid. Test at both ends of pool twice a week for be-st results. Packed in a portable bottle, convenient for use and carry. 50 pcs per bottle for long time use.