** DUE TO STAFF HOLIDAYS OUR NEXT DISPATCH DATE IS 19TH JULY **
** YOU CAN STILL ORDER, BUT PLEASE BE AWARE OF THE DELIVERY DELAY **
A booklet of 20 strips for detecting the full range of pH 1-14, Just dip into your liquid and check the colour change against the included pH chart.
Red – acid
Orange/Yellow – weak acid
Green – neutral
Blue – alkaline