Plastic Polyhedral Hollow Ball is made of standing up to chemical corrosion materials, such as polyethylene(PE), polypropylene (PP), reinforced polypropylene(RPP), polyvinyl chloride(PVC), chlorides polyvinyl chloride(CPVC) and polyvinylidene fluoride(PVDF) 25 mm, 38 mm, 50 mm, 76 mm bio ball for wastewater treatment, tower packing media 
Other type bio filter media
