1)10 years experience of manufacturing PP hollow ball 2)size:25-50mm 3)material: PP,PE,PVC,CPVC,PVDF 4)ISO9001:2000 Plastic Hollow Ball Random PackingsPlastic tower packings are made from polyethylene(PE),polypropylene(PP),reinforced polypropylene(RPP),polyvinyl chloride (PVC),chlorinated polyvinyl chloride(CPVC)and polyvinylidene fluoride(PVDF),They have a strong resistance to chemical corrosion ...