Variety pack of pH buffer solution.
Simple to use.
Powder has an indefinite shelf life.
Total volume: 1.2 litres. Each powder packet makes 100 ml of solution (when mixed with distilled or de-ionized water)
Contents: 6 packets of 4.0 pH & 6 packets of 7.0 pH
Extra: Includes one empty 100 ml bottle
Accuracy: +/- 0.02 pH at 25 degrees Celsius
Preparation directions included with the pack