Box of ten books of twenty leaves of size 65 x 10mm. Colour matching charts are printed on the cover of each book. Available in narrow specific pH ranges Specific Range: pH 2.0to 4.5 Specific Range: pH 3.5 to 6.0 Specific Range: pH 5.0 to 7.5 Specific Range: pH 6.5 to 9.0 Specific Range: pH 8.0 to 10.5 Wide Range: pH 2.0 to 1 0.5 Multi Range contains each above of 6 ranges. Full Range: pH 1.0 to 14.0.
