Matrix :Styrene Crosslinked with DVB Appearence:Clear spherical beads Whole Bead Count:95% min. Functional Groups: R-SO3? Ionic Form ,as shipped: Na Total Exchange Capacity:1.9 eq/l min. Moisture Retention: 43-48% Particle Size Range:0.315-1.25mm Swelling Na+→ H+:10% max. Shipping Weight:810 g/l (52 lb/ft3)