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Reand 1576
pH test paper Duotest pH 1–12, with two indicator zones
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Reand 1670
pH test paper Duotest pH 1.0–4.3, with two indicator zones
Reand 1519
pH test paper Duotest pH 3.5–6.8, with two indicator zones
Reand 1476
pH test paper Duotest pH 5.0–8.0, with two indicator zones
Reand 1548
pH test paper Duotest pH 7.0–10.0, with two indicator zones
Reand 1609
pH test paper Duotest pH 9.5–14.0, with two indicator zones