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An acid buffer solution in a single-use sachet. Ideal for on the spot calibration: just tear open the top, insert the meter electrode into the solution in the sachet and calibrate. California Proposition 65 ⚠ Proposition 65 Warning: This product can expose you to chemicals that are known to the State of California to cause cancer and birth defects or other reproductive harm.
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🇺🇸 Ship from USA · On Agora since 2024
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