Chemlab pH Strips  pH Indicator Strips (pH 7.0 - 14.0) pH Indicator Strips (pH 6.5 - 10.0) pH Indicator Strips (pH 4.0 - 10.0) pH Indicator Strips (pH 4.0 - 7.5) pH Indicator Strips (pH 2.5 - 4.5) pH Indicator Strips (pH 2.0 - 9.0) pH Indicator Strips (pH 0 - 1.5) pH Indicator Strips (pH 0 - 6.0) Universal Indicator Strips (pH 0 - 14) Chemlab pH Papers Comparator Paper (pH 5.5 - 9.0) - 3 x 5 meter - refill Comparator Paper (pH 5.5 - 9.0) - 1 x 5 meter Comparator Paper (pH 0.5 - 5.5) - 3 x 5 meter - refill Comparator Paper (pH 0.5 - 5.5) - 1 x 5 meter Universal Indicator Paper (pH 1 - 11) - 3 x 5 meter - refill Universal Indicator Paper (pH 1 - 11) - 1 x 5 meter Universal Indicator Paper (pH 1 - 14) - 3 x 5 meter - refill Universal Indicator Paper (pH 1 - 14) - 1 x 5 meter