Hydrion PH Test Paper is excellent for measuring pH solutions around neutral pH 7.00 and offers clear bright single color matches at every .5 interval from pH 4.5 to 8.5. 15ft/reel.
Hydrion PH Test Paper is excellent for measuring pH solutions around neutral pH 7.00 and offers clear bright single color matches at every .5 interval from pH 4.5 to 8.5. 15ft/reel.