For long term health of your elctrode use pH storage solution. It is a mixture of Potassium Chloride, Postassium Hydrogen Phthalate, Silver Nitrate, and Sodium Hydroxide.
Volume: 230 ml
        
| Item # | MT618 | 
| Weight | 0.50 LBS | 
| Item # | MT618 | 
| Weight | 0.50 LBS | 
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