Kits in the Professional Series offer a wide selection of test combinations for comprehensive pool water analysis. These kits are distinguished by their accuracy of liquid-to-liquid colorimetric testing, 2 oz. reagents, and attache'-style carrying cases. They also feature liquid-to-liquid comparators (Slide or Midget), reagents color-coded to instructions, waterproof instructions, treatment charts, 2004B Chemistry Guide, and Watergram Chart. If you are an operator or regulator of a commercial facility and you dont see the ranges or combinations to meet your local ordinances, call our Customer Service Department.