Comparator, pH 0-14, Each

Details

Full range pH measurement one roll 0-13 and one roll 12.5 to 14.0Clear color changes, from a bright blue at 12, through green at 13, to yellow at 145/32” wide x 15 feet roll in dispenser with 2 color comparison chartsReplacement test papers 3109D74 and D81 are furnished in package of 5 roll