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Apera Instruments PH400 Portable Ph Meter Kit With Pre-Mixed Buffers, 0.01 Ph Accuracy, 0-14.00 Ph Measuring Range, 3-Point Auto Calibration, 3'

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Aawipes Ph Test Strips 0-14: 100 Strips Universal Litmus Paper Ph Test Strips For Liquid Testing & Water & Food And Urine And Saliva, Ph Level

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