... in production & export ISO9001-2008 certified Plastic Heilex Ring (Tower Packing)1)ISO 9001:2008 2)Size: 50mm,76mm, ... free volume, low pressure drop, low mass-transfer unit height, high flooding point, uniform gas-liquid contact, small specific ... and environmental protection, etc. Physical & Chemical properties of plastic tower packing Performance / MaterialPEPPRPPPVCCPVCPVDFDensity (kg/m3)0.94-0.960. ...