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Fisherbrand Plastic pH Test Strips pH Range: 0.0 to 14.0:pH and Electrochemistry, | Fisher Scientific
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Amazon.com: Plastic pH Test Strips, Universal Application (pH 0.0-14.0, 0.5 pH Intervals), 100 Strips : Industrial & Scientific
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Plastic pH Test Strips, Universal Application (pH 0-14), 100 Strips | for Saliva, Soap, Urine, Food, Liquids, Water with Soil Testing, Lab Monitoring, etc.: Amazon.com: Industrial & Scientific
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