You will be hard-pressed to find another company that offers tighter specs and a wider range of conductivity standards: * Over twice the number of catalog SKU than the leading competitor * Specifications within 1 uS/cm, while the competition is within 5 or 10 uS/cm * CofA and label contains TDS and conductance information * A wide variety of sizes (500 mL to 20 L) with little lot to lot variation.