The 7-3000-17 is pH Test Paper Blue Litmus, pH 4.3-6.8, 100 strips per vial.
Used to test acids from pH 4.3 red to 6.8 blue/violet.
| Item# | Description |
| 7-3000-16 | pH Test Paper, Red Litmus, pH 6.8-8.1, Base or Alk. |
| 7-3000-17 | pH Test Paper, Blue Litmus, pH 4.3-6.8, Acid |
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