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MN 92110 universal ph indicator paper is a pH test paper for rapid measurement of acid alkalinity value in aqueous solutions. The pH value range of measurement is 0~14pH, and the division is 0-1-2 - 3-4-5 - 6-7-8 - 9-10-11 - 12 - 13 - 14pH. MN 92110 PH test paper 100 pieces per box.