| Brand | Bluelab |
|---|---|
| Type | pH Calibration Solution |
| Form | Liquid |
| Organic | No |
| Packaging | Bottle |
Check the listing for details. Blue Lab Truncheon And Ph Pen. Condition: Used. Listed at 79.99 USD. Used … these are mine. They are calibrated. Ph pen needs batteries but still works. They are dirty and stained from years of use. I had to give up growing or else you wouldn’t be getting these … I love my meters but have no use for them at this point.