pH indicator strips with 4 pads, pH 0,0 - pH 14,0, Interval: 1 pH, 100 strips/paStrips made of vinyle with 4 indicator pads prepared with a non bleed system, therefore the resultant colour change will remain far longer and readable until the pads are dry, even with a highly alkaline solution. These strips provide an accurate method of measuring the pH of a solution and produce high quality results each time. 100 strips per pack