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.