pH Test Strips 4.5 - 9.0 (100 strips) for Urine & Saliva

Price:£8.99
2 out of 5 stars Thursday 12 March, 2015 By John L.
Half of the batch supplied did not change colour regardless of the alkilinity or acidity of the sample being checked.
This was a faulty batch so I cannot recommend this item to anyone else.
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