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- pH value: 4.01 / 7.00 / 10.01 per 250ml
- Precise calibration: Accuracy of pH 0.015 allows highly accurate calibration
- Easy recognition: Based on the colors, you can recognize the correct solution at a glance (pH 4: red, pH 7: green, pH 10: blue)
- Use immediately: Instead of dissolving powder in distilled water first, you can use this solution immediately
- Long durability
- Batch certificate available on the Internet
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