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.

Plastic Heilex Ring is a highly open random packing suited to gas-treatment applications where hydraulic capacity, pressure-drop control, low bed weight, corrosion resistance and moderate fouling tolerance are important. Selection should balance these benefits against mass-transfer requirements, polymer limits, packing size and tower geometry.

Plastic Snowflake Ring is a highly open random packing suited to applications where hydraulic capacity, low bed weight, corrosion resistance and moderate fouling tolerance receive greater priority than maximum surface-area density. Selection should consider process duty, fouling, polymer compatibility, packing size, tower diameter and required mass-transfer performance.