BOJACK pH Test Strips Universal Test Paper pH 1-14 Litmus Paper for Soil Water

BOJACK pH 1- 14 Test Paper Extensive Test Paper Litmus Test Paper pH Test. Neutral when the PH value is equal to 7；acidity when the PH value is greater than 7；Alkaline when PH value is less than 7. The test strip color changes must be matched with the pH scale color chart within about 15 seconds.

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