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

Price:£8.99
5 out of 5 stars Tuesday 18 October, 2016 By Franc
The double patches do make it easier to decide on the pH value if, like me, you are not very good with colours. More recently, I purchased a pH meter with digital readout, that completely solves any uncertainty.