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Reand 827
pH test paper Duotest pH 1–12, with two indicator zones
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Reand 896
pH test paper Duotest pH 1.0–4.3, with two indicator zones
Reand 829
pH test paper Duotest pH 3.5–6.8, with two indicator zones
Reand 824
pH test paper Duotest pH 5.0–8.0, with two indicator zones
Reand 882
pH test paper Duotest pH 7.0–10.0, with two indicator zones
Reand 852
pH test paper Duotest pH 9.5–14.0, with two indicator zones