Dia: 16mm,25mm,38mm,50mm,76mm Professional Manufacturer for PP Pall Ring. ISO9001:2008 Approval Plastic Pall Ring has an ... , separation of ethylbenzene, seperation of isooctane/ methylbenzene. Physical properties of PP Pall Ring: D*H*T (inch)D*H*T (mm ... for Plastic Pall Ring could be olypropylene, strengthens polypropylene, strengthen nylon6, strengthen PBT,PE, PP, PVC, CPVC, and PVDF per your request ...