Plastic Igel Ball is a distinctive 40 mm plastic random packing with numerous radial projections and a verified specific surface area of approximately 300 m²/m³. Its selection should balance contacting-area requirements against 87% void fraction, hydraulic limits, fouling, tower diameter and polymer compatibility rather than treating the spiked geometry as an automatic efficiency or anti-fouling advantage.

PVDF Pall Ring is a fluoropolymer random packing that combines open Pall Ring geometry with PVDF material for chemically demanding packed-tower service. DAIER’s engineering database currently contains 25, 38 and 50 mm PVDF Pall Ring nodes; final application should confirm process chemistry, temperature, fouling, hydraulic conditions and manufacturer-specific product data rather than treating PVDF as an automatic performance upgrade.

PVDF Raschig Ring is a fluoropolymer random packing represented in DAIER's engineering database in 25, 38 and 50 mm sizes. Selection should first establish whether PVDF is truly required by the chemistry and temperature, then balance packing size against mass transfer, hydraulic openness, fouling, tower diameter and retrofit compatibility.

PTFE Pall Ring combines fluoropolymer material with open Pall Ring geometry and is represented in DAIER's engineering database in 25, 38 and 50 mm sizes. Selection should first confirm whether PTFE is genuinely required by the process chemistry and temperature, then balance contacting intensity, hydraulic openness, fouling, tower diameter and support requirements.

PTFE Raschig Ring is a specialized random packing available in DAIER's verified database in approximately 20–76 mm sizes. Smaller models provide greater specific surface area, while larger models reduce element count and create larger characteristic passages; final selection should first justify PTFE from the actual chemistry and temperature, then evaluate size, hydraulics, fouling, tower diameter and support loading.