1. pH test reagents 2. alkaline/acidic test 3. pH range 4.0-10.0 4.10ml per ... bottle 5. stable package Item Name:pH Test ReagentHow To UseDrop three globelets into water, then the paper ... alkaline or acidicRemark:pH range 4.0~10.0Feature: accurate testing,low price, new type,easy to operate,convenient to carry ... ,the drinking water quality,teaching demonstration and so on. pH test reagents