... export ISO9001-2008 Plastic Polyhedral Ball, Polyhedral Plastic Hollow Ball, Polypropylene Plastic Ball Plastic Polyhedral Hollow Ball Packing is made from heat ... pressure drop, low mass-transfer unit height, high flooding point, uniform gas-liquid contact, small specific gravity, high mass ... >8.0>10.0Technical Data for Plastic Polyhedral Hollow Ball Packing Specification (mm)Surface area (m²/m³)Free ...