| Brand | Unbranded |
|---|---|
| Type | pH Meter |
Check the listing for details. 15 PCS PH BUFFER SOLUTION POWDER PRECISE CALIBRATION - pH 4.01 / 6.86 / 9.18 New. Condition: New. Listed at 9.32 USD. 5 4.01 solution (potassium hydrogen phthalate). -5 6.86 solution (mixed phosphate). -5 9.18 solution (Borax).