5 In 1 Digital Water Quality Tester Pen EC PH Salinity Temp Meter/Detector
(Sea salt/fresh water salt). pH test range: 0.01-14.00pH. Resolution: 0.01pH Accuracy: ±0.05pH. It is a waterproof water quality test pen with five functions. 19052 ELIXIR Optiweb Nickel Wound 10-46 Electric Guitar Strings UK.