201x4 is a high capacity, shock resistant, gelular,Type I ,strongly basic anion exchange resin. For Efficient Demineralibation Including Silica ... Removal201x4 is a high capacity, shock resistant, gelular,Type I ,strongly basic anion exchange resin supplied in the chloride or ... /h (2 to 10 gpm/cu/ft.) Strong-Base Type I (Gel) Anion Exchange Resin