... , PP, RPP, PVC, CPVC, PVDF, PTFE, HDPE Size: 5/8", 1", 1.5", 2", 3" Use as tower packing Plastic pall ring:PE pall ring ... , etc.Technical data of Plastic pall ring: Diameter (Inch)Dimension d×h×δ (mm)Specific surface area (m2/m3)Void volume(m3 ... .9023953500911.5 "38×38×1.41150.8922015800712 "50×50×1.5930.901276500563 "76×76×2.6730.9294193060 Plastic pall ring (Dia.5/8", 1", 1.5", 2", 3")