The product description
1. Standard color card
2. High quality ph paper
3. Indentation design
4. Moisture proof packaging
5. ph value: 3.8-5.4
6. Fancy box packing
7. Accurate measurement and high precision
3.8 4.4 4.8 5.4
4.1 4.6 5.1
0.6% ph | 3.8 4.4 4.8 5.4 |
0.5% ph | 4.1 4.6 5.1 |