Metal Cascade Mini Ring is available in DAIER's catalog-confirmed 0P-to-5P series, with specific surface area decreasing from approximately 427 to 65 m²/m³ while void fraction increases from 94% to about 98% and dry packing factor falls from 55 to 7 m⁻¹. Model selection should balance mass-transfer demand, hydraulic capacity, fouling, tower diameter, alloy compatibility and support-grid requirements rather than automatically choosing the smallest or largest model.

Ceramic Mini Lessing Ring is represented in DAIER's verified database from 10 to 150 mm, with specific surface area decreasing from approximately 420 to 60 m²/m³ and dry packing factor decreasing from 1,250 to 101 m⁻¹. Final size selection should balance mass-transfer requirements, hydraulics, fouling, tower diameter, ceramic bed weight and support-grid compatibility rather than simply choosing the smallest or largest model.

PP Intalox Saddle combines polypropylene construction with saddle-type random packing geometry and is represented in DAIER's engineering database in 25, 38, 50 and 76 mm sizes. Its selection should first confirm PP compatibility with the actual chemistry and temperature, then evaluate geometry, size, hydraulics, fouling, tower diameter and tower-internal compatibility.

Plastic Cascade Mini Ring is available in DAIER's verified 16, 25, 38, 50 and 76 mm series. Increasing size reduces specific surface area and packing factor while generally increasing void fraction, so final selection should balance mass-transfer demand, gas throughput, fouling, tower diameter and support-grid compatibility rather than simply choosing the smallest or largest model.

PVC Intalox Saddle is a material-specific plastic random packing represented in DAIER’s engineering database in 25, 38 and 50 mm sizes. It is most relevant where PVC is chemically and thermally suitable and saddle geometry fits the gas-liquid contacting duty; final selection should also consider fouling, hydraulics, tower diameter, distributor performance and supplier-specific product data.