Package includes: 1 roll of pH indicator, 5 meters. Scope of use: school supplies, office supplies pH test: High quality PH active paper strips with a pH test range of 0-14 for acidic, neutral or alkaline testing. EASY TO USE - Provides reliable and very accurate pH readings. Comes in an easy-to-use plastic wheel that only needs to be activated with a small amount of tape to test it. Note: During the test, the color of the test paper changes for about 15 seconds and accurate pH value reading can be obtained according to the standard color card provided.
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