Feature: 1. 3 Types: The PH electrode storage solution offers three distinct solutions, pH 7.00, pH 4.00, and pH 10.01, catering to a wide range of pH testing requirements. This comprehensive set ensures that pH meters are accurately calibrated for precise and reliable measurements in various applications. 2. Multifunctional: In addition to facilitating accurate calibration, the PH meter calibration solution provides essential guard for electrodes, helping to prolong their lifespan and maintain optimal performance over time. This protective feature ensures that your pH testing equipment remains in top condition for consistent and accurate results. 3. Good Compatibiltiy: Designed for user convenience, the PH buffer calibration solution set is compatible with a variety of pH pens and electrodes, making the calibration process simple. Users can easily achieve accurate calibration results with minimal effort. 4. Accurate Testing: Formulated with excellent ingredients and precise ratios, the PH pens calibration solution in this set deliver consistent and stable calibration results, ensuring that pH measurements are accurate and reliable across different testing scenarios. Users can trust in the accuracy and consistency provided by this calibration fluid set for their pH testing needs. 5. Wide Application: Whether used in laboratory settings, household applications, or industrial environments, the PH tester calibration fluid set offers professional grade calibration solutions for pH testing equipment. This versatile set is suitable for a diverse range of users and applications, providing a dependable and accurate tool for monitoring pH levels with confidence and accuracy. Specification: Item Type: PH Meter Calibration Solution Set Material: Liquid Single PH Calibration Solution Capacity: 50ML ( Shipped with Liquid ) Test Range of PH Calibration Solution: 7.00, 4.00, 10.01 Probe Guard Liquid Capacity: 30ML ( Shipped with Liquid )Weight: Approx. 357.00g / 12.59oz. Package List: 3 x PH Calibration Solution 1 x Probe Protective Liquid 1 x Manual