... 5. stable package Item Name:pH Test ReagentHow To UseDrop three globelets into water, then the paper ... ,low price, new type,easy to operate,convenient to carry Target: effective to any colorless alkaline solution whose ph ... value is from 4 to 10 Package: 10 ml a bottle Instrucion: drop 3-4 the ... reagent to 50ml tested solution and shake,or drop 1-2 reagent to ...