Ceramic Raschig Ring is available in DAIER's verified catalog from approximately 6 to 100 mm. Although smaller sizes generally provide greater surface-area density and larger sizes create a coarser bed, void fraction, bulk density and packing factor are not perfectly monotonic, making supplier-specific data essential for hydraulic, fouling, tower-diameter and retrofit decisions.

Ceramic Intalox Saddle is available in DAIER's catalog-confirmed standard series from 13 to 76 mm, with specific surface area decreasing from approximately 650 to 95 m²/m³ and dry packing factor decreasing from 420 to 127 m⁻¹. Final size selection should consider surface area, non-monotonic void fraction, bed weight, hydraulic requirements, fouling, tower diameter and support-grid compatibility, while keeping standard Intalox Saddle separate from Ceramic Super Intalox Saddle.

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.