Various bulk packing: Raschig ring, spiral ring, cross clapboard ring , pall ring, ... .4 ≤0.5 ≥98 ≥150Stoneware≥4.4≤3 ≥92≥300Various bulk packing: Raschig ring, spiral ring, cross clapboard ring , pall ring ... /450 m2/m3 void ratio: 90/85/80/75/70 % bulk density: 300/350/450/500/550 kg/m3 compressive strength: ≥2 ...