Indicator test strips, pH. Range 5 to 9 5. Chart readings pH 6, 7, 8 & 9 Made from non bleed test paper mounted on plastic wand. Includes comparison chart.
Indicator test strips, pH. Range 5 to 9 5. Chart readings pH 6, 7, 8 & 9 Made from non bleed test paper mounted on plastic wand. Includes comparison chart.