Advantages: 1.leight weight, 2.large free-surface, 3.convenient installing. Description of Multi-Faceted Hollow Ball FillerMulti-Faceted Hollow Ball FillerMulti-faceted hollow ball filler,with a ring reinforced along the medium of circumference. Along the ring,there are 12 pieces ball valve, the ball valve upper and lower cross. Along the central axis of radioactive arrangement. With the help of ...