... 1", 1.5", 2", 3" Use as tower packing Plastic pall ring:PE pall ring, PP pall ring, RPP pall ring, PVC pall ring, CPVC pall ring, PVDF pall ring ... industry and environmental protection, etc.Technical data of Plastic pall ring: Diameter (Inch)Dimension d×h×δ (mm)Specific surface area (m2/ ... m3)Void volume(m3/m3)Dry packing factor ( m-1 )Heaping number ...