Yuhui C-SS7-U is a premium grade gel-type strong acid cation (SAC) exchange resin based on sulfonated styrene-divinylbenzene (DVB) copolymers with uniform particle size distribution. Its 7% cross-linkage offers the optimal performance on both kinetics and resistance to oxidation. Due to the special jetting technology, C-SS7-U has extremely uniform particle size, which increases the kinetics and efficiency of regeneration, and decreases pressure drop effectively. C-SS7-U is developed to be used for industrial water softening when it works in sodium form and demineralization when it works in hydrogen form.