Special-Indicator papers with color scale pH 7,2 - 9,7

Special-Indicator papers with color scale pH 7,2 - 9,7, in practical turning lid box with color scale, width 7 mm.
With impregnated specific color indicators for defined pH scales.
Rapid and easy pH measurement, available in many diverse designs.
Handy plastic reel for example ensures long-term stability and protection against mandy external influences.
Measuring Range: <7,2 · 7,2 · 7,5 · 7,8 · 8,1 · 8,4 · 8,7 · 9,0 · 9,3 · 9,7 · >9,