ResinTech CG8-F-HP is a high purity fine mesh strong acid cation resin in sodium form. It is amber in color and made with an 8% cross-linked gel. The HP (high purity) designation means it is Gold Seal Certified by the WQA for use in potable water applications. CG8-F-HP is intended for potable water softening applications that have high levels of iron in the feedwater and where resin bed depth is less than ideal.