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A pH test strip is a strip of litmus paper with which you can measure the pH value of a liquid. The substance in the paper causes the paper to show a different colour at different acidities. The official pH scale is from 0 to 14, where 0 is very acidic and 14 very alkaline.
| Color: | Blue, Purple, White |
| Size: | 20, 24 |
| Material: | 100% Polyester |
