Swimline Pool Test Strips<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Contains 50-strips</li><li>Test Free Chlorine， pH， Alkalinity， Cyanuric Acid</li><li>High Quality， top of the line product from Swimline</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41A3HbONAkL.jpg" noproxy>