说明

• Description： * Brand new and high-quality *Take correct alkaline/acid checks with this pack of eighty Litmus paper strips *Each e-book also features a shade chart Specifications The scale reads from 1 to 14: 1 - three signifies a very acidic substance 4 - 6 signifies an acidic substance 7 signifies neutral eight - eleven signifies alkalinity 12 - 14 indicates a very excessive level of alkalinity Package Included 1 x books containing eighty strips (80 strips in total)

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