... PP,PE,PVC,CPVC,PVDF 4)ISO9001:2000 Plastic Hollow Ball Random PackingsPlastic tower packings are made from polyethylene ... , Conjugate ring, HQM flat ring, Teller Rosetter ring, Hollow ball, Polyhedral ball, Cage ball and Covering ball,HQR ring ... . Characteristic Indexes of Plastic hollow ballNameNormalmmDiameter×Height×ThicknessmmSurface aream2/m3Void space%Bulk densitykg/m3No. ...