ORP Calibration Buffer Powder 256mV Redox Potential Analyzer Test Pen Calibration Liquid Buffer ORP correction powder buffer powder is a newly developed, convenient to transport and carry, solves the problem of inconvenience and expensive transportation of ORP correction liquid, and makes ORP correction more convenient and easy. Add 50ml of distilled water or purified water to a pack of powder About that product : This powder can be configured with 256mv ORP calibration liquid Please note: The product does not include the test pen in the picture, this is a mold to show the powder function Package included: 1 x ORP Buffer Calibration Powder Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store