Aquafast™ Formazin Turbidity Standard, 6 to 6.4 pH, 475 ml, For Use With Aquafast™ AQ4500 Turbidity Meter, Includes 800, 100, 20 and 0.02 NTU Standards in 60 ml Bottles
| Chemical Quantity | : | 475 ml |
| pH Range | : | 6 to 6.4 |