Various bulk packing: Raschig ring, spiral ring, cross clapboard ring , pall ring, rectangle ... ≤0.5 ≥98 ≥150Stoneware≥4.4≤3 ≥92≥300Various bulk packing: Raschig ring, spiral ring, cross clapboard ring , pall ring, rectangle ... ring, cascade ring, torus ring , keel ring , conjugation ring. Ceramic corrugated packing surface area: 125/250/350/400/450 m2/m3 void ...