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![Universal 1-14 pH Test Paper Roll, Wide Range [5.5 Yard (5m) Length x 1/4" (7mm) Thick Roll with Dispenser]: Amazon.com: Industrial & Scientific](https://images-na.ssl-images-amazon.com/images/W/MEDIAX_792452-T2/images/I/71nO5SZZR3L._AC_UL600_SR600,600_.jpg "Universal 1-14 pH Test Paper Roll, Wide Range [5.5 Yard (5m) Length x 1/4\" (7mm) Thick Roll with Dispenser]: Amazon.com: Industrial & Scientific")
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