4 bags PH Buffer Powder for PH Test Meter Measure Calibration Solution 1pcs 4.00 and 1pcs 6.86 Calibration Point
2x PH 4.00
2x PH 6.86
Note:PH 4.00 and PH 4.01 are sent randomly.
And this product we have two style,we will ship them by randomly.