pH-Set U 10 box with 10 different reels universal and special indicator paper pH 1-11, pH 0.5-5.5, pH 3.8-5.8, pH 5.4-7.0, pH 5.5-9.0, pH 6.4-8.0, pH 8.0-10.0, pH 9.0-13.0, pH 12.0-14.0