pH Test Strips 2.8-4.4 For Wine And Cider - Pack of 10

Comes with a colour comparison chart

Dip the strip for two seconds, shake off excess liquid and compare to colour chart within 40 seconds

Indicates pH At 2.8, 3.2, 3.6, 4 and 4.4

Above pH 3.8 there can be harmful microbial acitivity in non-pasteurised juices, therefore you will need to test the pH if you want to perform a natural fermentation of cider or wine.