Extend the life of your Bluelab pH PenPlus with a replacement pH, and temperature probe. Product Contents Bluelab pH ProbePlus 1x Bluelab pH 7.0 Calibration Solution, single-use 1x Bluelab pH 4.0 Calibration Solution, single-use 1x Bluelab KCl Storage Solution Multi-language Getting Started Guide (EN, ES, DE, FR) Warranty Information 6-MONTH - LIMITED WARRANTY