Hydrofarm Batteries for pH/TDS pen or Thirsty Light (pack of 4 batteries) (HGPROBAT)
Stock up on batteries for your pH/TDS pen and never be without. The tiny battery discs hardly take up any room-- you can even store them right in your pen case so you're always prepared.
Also work as replacement batteries for your Thirsty Light.
| ||Manufacturer's Product Information || |
|MSRP each $||6.95|
|Dimensions||5.51 x 0.48 x 8.46|
— Ships from HF: OR, CA, CO, PA, TX, FL USA (not via USPS).