... leight weight, 2.large free-surface, 3.convenient installing. Description of Multi-Faceted Hollow Ball FillerMulti-Faceted Hollow Ball FillerMulti-faceted hollow ball ... with high efficiency transferring substances, large free-surface, light weight, strong resistance,convenient installation,widely used in chlorine removing,oxygen ... :2011/10/17 4:27:42 Multi Faceted Hollow Ball Filler for water treating