General Hydroponics pH 4.01 Calibration Solution 1 qt (GH1542)General Hydroponics uses the highest quality electronic meter reference solutions. Growers can use our reference solutions widely among many popular brands of meters using the NaCl scale. General Hydroponics technicians check each batch to ensure that our solutions are exactly calibrated each time they are used.
| ||Manufacturer's Product Information || |
|MSRP each $||21.5|
|Dimensions||1.8 x 6.1 x 1.8|
— Ships from Vancouver, WA and/or HF: North & South California, Colorado, Pennsylvania, Texas, Florida USA.