Plastic Polyhedral Hollow Ball is a multi-size random packing with an open hollow framework and substantial gas-liquid contacting surface. Selection should balance surface area, hydraulic openness, fouling tolerance, tower diameter and polymer compatibility, and final procurement should use the approved product datasheet rather than nominal size alone.

Plastic Lanpac is a random packing family available in DAIER's verified database in 60 mm and 90 mm classes. The 60 mm model provides substantially greater specific surface area, while the 90 mm model provides greater void fraction and lower bulk density, creating a meaningful mass-transfer-versus-hydraulic-openness selection decision.

Plastic Pentagon Ring is a multi-size random packing that combines relatively high specific surface area with high void fraction. Its suitability depends on the required mass transfer, hydraulic capacity, fouling risk, packing size, tower diameter and polymer compatibility.

Plastic Hiflow Ring is a multi-size random packing family whose engineering characteristics shift significantly from high-surface-area small models to highly open large models. Selection should balance mass-transfer requirements, hydraulic capacity, fouling tolerance, tower diameter and polymer compatibility rather than treating every Hiflow Ring size as equivalent.

Plastic Ralu Ring is a multi-size random packing family that can provide different balances of surface area, hydraulic capacity, fouling tolerance and bed weight depending on nominal size. Selection should consider process duty, tower diameter, operating loads, polymer compatibility and the specific Ralu Ring model rather than the family name alone.