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![pH 0-7, 3 Pad Test Strips [Bag of 50 Strips]: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/71ulyq4mupL._AC_UF1000,1000_QL80_.jpg "pH 0-7, 3 Pad Test Strips [Bag of 50 Strips]: Amazon.com: Industrial & Scientific")
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