... solid shapes dumped in a cylindrical column . Tower Packing is usually thought of as a mass ... a wet scrubber to make contact. Structured tower packing is thought of in much the same ... and liquid to make contact.Plastic random tower packings include pall ring ,raschig ring ,intalox ... petrochemical ,fertilizer ,environmental protection ..Usual material is Polypropylene (PP),also got PE,PVC ,CPVC,PTFE,PDF ...