Orion pH Buffer Bottles, Perform accurate, reproducible pH calibrations, Each

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All Orion pH Buffer Bottles have pH/temperature tables printed on the labels for accurate calibrations and NIST traceability. Manufactured under ISO 9000 quality standards.Buffer Color Codes:pH 4.01 buffer is pinkpH 7.00 buffer is yellowpH 10.01 buffer is blueThe buffers are also available in pint (475mL) bottles, portable five packs of 2 oz. (5 x 60mL) bottles, 5 gallon (19L) cubitainers and single-use pouches.