Orion pH BuffersThermo Scientific Orion pH Buffers Orion pH buffers are manufactured under ISO 9000 quality standards. Buffers are color coded for ease of use, packaged with buffer temperature tables for accurate calibrations and NIST traceability. Standard All in One pH Buffer Kit, includes: 1 pint (475mL) bottle each of pH 4. 00 buffer, pH 7. 00 buffer, pH 10. 01 buffer & Standard pH Electrode Storage Solution; and one pH Electrode Storage Bottle