The Gravex mixed beds are a blend of individual cation and anion components. These homogeneous mixes are ready to use and do not depend upon mixing capabilities at customer sites. A number of different capacity and volumetric ratios and combinations of component types are offered. Most common is an equivalent capacity ratio of the hydrogen form cation and hydroxide form anion. This results in a fully deionizing product for high-purity applications. High cation ratio mixes are offered for applications where greater cation capacity is indicated.