Features: 3 packs of popular pH buffer solutions, pH4.01, pH6.86 and pH9.18
Simple to use. Just add 250ml per powder packet
Powder has an indefinite shelf life
Easy 3-step procedure is written at the back of the packet
Each powder packet/sachet makes 250ml of solution (when mixed with distilled or deionized water)

Specifications: Each pack volume: 250
Each powder packet/sachet makes 250ml of solution (when mixed with distilled or deionized water)
Accuracy: ±0.01pH at 25°C
Size: 7.5x6.5cm
Quantity: 3 Pcs/1 Set

Package Includes: 1 x pH4.01 Calibration Powder
1 x pH6.86 Calibration Powder
1 x pH9.18 Calibration Powder

note: 1.Transition: 1cm=10mm=0.39inch
2.Please allow 0-3cm error due to manual measurement. pls make sure you do not mind before you bid.
3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!