15 Pack pH Buffer Calibration Solution Powder 4.00/6.86/9.18 for Precisely Calibrate pH Meter, Easy and Accurate pH Tester Calibration Powder Packets
Main Features:
- The resolution accuracy is ± 0.01 pH.
- The kit contains pH 4.01, PH6.86, and PH 9.18 calibration solution for your different needs.
- Calibration powders allow you to test the pH of your pool, aquarium, and water with your pH tester. DESIGNED FOR PORTABILITY: Individual packages can be conveniently transported and stored away.
- Meets US FDA and European LFGB safety standards. No harmful and toxic chemicals.
- Note: Please do not put it in places where children can touch it. Risk of injury.
Instructions For Use:
1. Prepared distilled water 250ml per pack
2. Empty the power completely into a clean 250ml cup.
3. Add 250ml of distilled water into the cup.
4. Stir until the force has completely dissolved.
Specifications:
Contents per pack: 250 ml.
Each sachet makes 250ml of solution (after mixed with distilled or deionized water).
Accuracy: ±0.01pH at 25°C
Color as shown
Size:7.5*6.5cm
Package Includes: 
5 x PH 4.01 Buffer Powder
5 x PH6.86 Buffer Powder
5 x PH9.18 Buffer Powder