说明

• 80 Strips/pack PH Test Strips with Control Card Full PH Meter PH Controller 1-14st Indicator Litmus Tester Paper Water Soilsting Description Condition: 100 percent Brand New and High Quality Take accurate alkaline/acid assessments with this pack of eighty Litmus paper strips Each e-book also encompasses a colour chart Specifications The scale reads from 1 to 14: 1 - 3 signifies a very acidic substance 4 - 6 indicates an acidic substance 7 indicates neutral eight - eleven signifies alkalinity 12 - 14 signifies a very excessive level of alkalinity Package Included 1 x books containing eighty strips (80 strips in total)