- The 10 Books per pack (Each book contain 20 Papers). High accuracy pH test paper, pH range from 2-10.5
- The pH 2-10.5 color chart with each book The test strip color changes must be matched with the pH scale color chart within about 15 seconds
- Can be used to measure pH of water, soap, lemon juice, vinegar, milk, liquid detergent, moisturized soil, saliva, urine, sweat
- Eco Friendly
- Easy to use