Hanna pH 7.01 Calibration Solution, 20 ml, case of 25 Promote the other for Calibration

the other for Calibration

100% natural and organic

comprehensive gardener's tool in powder form

This single shelf is used to add or replace a shelf in the Vertical Grow Shelf system

Run Up To Three Inline

Hanna pH 7.01 Calibration Solution, 20 ml, case of 25 Promote the other for CalibrationpH 7 is the most frequently used pH buffer. All Hanna solution bottles come with a pH vs. temperature chart together with the production lot # and expiration date to guarantee maximum accuracy. Formulation Hanna pH buffers are made of potassium dihydrogen phosphate and disodium hydrogen phosphate and are standardized with a pH meter calibrated to NIST primary standard buffer solutions (NIST 186Ie & 186IIe and NIST 158g S. R. M.).