5X ORP Calibration Powder Buffer Powder ORP Tester Measuring Calibration Solution 256MV

5X ORP Calibration Powder Buffer Powder ORP Tester Measuring Calibration Solution 256MV This product is a one-time-use product and cannot be stored. It is recommended that you purchase more at one time as needed to get a greater discount. It is recommended to use calibration once a week Instruction: 1.Add the contect of the sachet into a container with 50ml(1.69oz) of distilled water at the temperature of 25c(77f) 2.Mark the container with the ORP level powder used for future reference and keep it away from children. Colour:white Material:ORP Package Contents: 5 x ORP Calibration Powder