Parameters of Saddle RingMaterial Specification Specific Area Void Ratio Number Bulk Density Dry Packing Factor D×H×δ α ε% n γp α/ε3 mm m2/m3 m3/m3 m-3 kg/m3 m-1 PPSaddle Ring 25×12.5×1.2 288 0.847 97680 68 473 38×19×1.2 265 0.95 25200 57.9 405 50×25×1.5 250 0.96 9400 56.4 332 76×38×2.6 200 0.97 3700 59.2 289 100×50×3 180 0.98 2100 54.6 268