Plastic pall ring Diameter: 16, 25, 38, 50, 76mm PP, PE, PVDF, PVC, RPVC, ... Technical data of Plastic pall ring: Diameter (mm)Dimension d×h×δ (mm)Specific surface area (m2/m3)Void volume( ... kg/m3)Φ1616×16×11880.91275112000141Φ2525×25×1.21750.902395350091Φ3838×38×1.41150.892201580071Φ ... 5050×50×1.5930.90127650056Φ7676×76×2.6730.9294193060 Plastic polypropylene pall ring (16, 25, 50, 76mm)