Designed to provide softened water within both commercial and industrial applications, the SPECTRUM SRSO is a high capacity, gel type sulfonated polystyrene cation resin supplied in the sodium form as moist, tough, uniform spherical beads, which removes hardness ions (calcium and magnesium) in exchange for sodium ions. Typically used in pressure vessels or empty catridge shells for smaller applications this resin with its high bead integrity, excellent chemical and physical stability coupled with very low extractable content is ideal for use in general and sensitive/critical applications.