Bluelab Probe Care Kit - pHEverything you need to clean, calibrate and maintain your pH probes Your Bluelab Probe Care Kit pH contains: Probe care instructions 18 ml single use Bluelab Solution Sachets two each of: pH 7. 0, pH 4. 0 and KCl solutions Three plastic cups Bluelab pH Probe Cleaner Toothbrush for cleaning your pH probe Packaging may vary Care, hydration and calibration in one kit Maintaining your Bluelab pH probes To ensure ongoing accuracy and longevity, we