Bluelab Probe Care Kit - pHEverything you need to clean, calibrate and maintain your pH probes Your Bluelab Probe Care Kit pH contains: Equipment 1x Probe care instructions 3x Plastic cups 1x Bluelab pH Probe Cleaner, 30 ml 1 fl. oz 1x Toothbrush Solution 2x Single use pH 4. 0 Calibration Solution Sachets, 18 ml 0. 6 fl. oz 2x Single use pH 7. 0 Single use Calibration Solution Sachets, 18ml 0. 6 fl. oz 2x Single use 2. 77 EC Conductivity Standard Solution Sachets, 18 ml 0. 6