Bluelab® Probe Care Kit pH & ConductivityEverything you need to clean, hydrate and calibrate pH probes as well as clean and test conductivity (ppm EC) probes. The instrument is only as accurate as the probe is clean. Accurate readings simplify crop management and provide improved growth. Includes instructions, 20 ml single use Bluelab Solution Sachets, 2 each of: pH 7. 0 & pH 4. 0, KCl, 2. 77 EC, 3x plastic cups, pH Probe Cleaner, Conductivity Probe Cleaner, Toothbrush and Chamois.