PH Solution Buffer 50 Ml Bottles Of PH 4.00 6.86 9.18 Calibration Solution YK

1、Reusable design: With 50ml of PH solution buffer in each bottle, you can use it for multiple purposes and save costs. As long as it is not polluted, you can reuse it and conserve resources. PH value: PH4.00 / PH6.86 / PH9.18.

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