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Reand 949
pH test paper Duotest pH 1–12, with two indicator zones
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Reand 1028
pH test paper Duotest pH 1.0–4.3, with two indicator zones
Reand 926
pH test paper Duotest pH 3.5–6.8, with two indicator zones
Reand 940
pH test paper Duotest pH 5.0–8.0, with two indicator zones
Reand 1009
pH test paper Duotest pH 7.0–10.0, with two indicator zones
Reand 969
pH test paper Duotest pH 9.5–14.0, with two indicator zones