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Best Choice Haobase 
Haobase pH Test Strips Full Range 1-14 Litmus Paper Litmus pH Testing Strips for Water, Drinks, Vinegar, Soap (80 Strips Item size: 70*44*4mmYotsuba 
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Plastic pH Test Strips, Universal Application (pH 0-14), 100 Strips | for Saliva, Soap, Urine, Food, Liquids, Water with [Widely Used] pH paper test strips can be applied for schools, lab, drinking water, swimming pools, fish tank, hydroponiHuakaile 
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