Poolmaster 22242 2-Way Test Kit with DPD Tablets and Case - Basic Collection<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>For maintaining proper water chemistry</li><li>Tests for Chlorine and pH</li><li>Includes round vial test block</li><li>DPD tablets test for Free Chlorine levels and Phenol Red tests for pH</li><li>Phenol Red is for use with 2 or 3-Way Test Kits Only - not to be used with 5-Way Test Kits</li><li>(Note: Phenol Red is not the same as Solution #2 Phenol Red - DO NOT interchange)</li><li>Comes complete in polyethylene case</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51YtK239KXL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51d2dNcXrOL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41FpJ5vcUpL.jpg" noproxy>