• Singly sealed to ensure long-term stability and protection against many external influences
• Have to be placed in the plastic reel with color scale to be used
• Gradation (pH): less than 7.2 - 7.2 - 7.5 - 7.8 - 8.1 - 8.4 - 8.7 - 9.0 - 9.3 - 9.7 - greater than 9.7
