... & export ISO9001-2008 Plastic Polyhedral Ball, Polyhedral Plastic Hollow Ball, Polypropylene Plastic Ball Plastic Polyhedral Hollow Ball Packing is made from ... resistant and chemical corrosion resistant plastics, including polyethylene (PE), polypropylene (PP), reinforced polypropylene (RPP), polyvinyl chloride (PVC), chloridized polyvinyl chloride (CPVC) and ...