• Unify pH indicator and reference color chart on one strip
• Any sample color has the same effect on both, the reference colors and the reactive pad, allowing unadulterated pH reading even in colored solutions
• Gradation (pH): 6.0 - 6.3 - 6.6 - 6.9 - 7.2 - 7.5 - 7.8 - 8.1
• Length: 100 mm
• Width: 11 mm