Neutral Litmus pH test paper tests for Neutrality of a solution, or its acidity or alkalinity, does not come with a color chart, test strip will turn red if dipped into an acidic solution (pH <7) or blue if dipped into an alkaline solution (pH >7), Size: 100 test strips
Tech-Med* Pocket Eye Test Chart, Use at 14 in Provides 20/800 distance, Durable, laminated plastic, Metric & English Scale on back, Size: 6-1/2x 3-1/2 in
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