... ,304L,410,316,316L ISO9001:2000 Metal Cascade RingMetal Cascade Mini Ring is made by materials like carbonsteel,stainless steel or ... towers under vacuum to treat thermosensitive,decomposable,polymerizable or cokable systems,for these,Pingxiang Petrochemical metal tower packing is widely used ... ,stainless steel including 304,304L,410,316,316L Metal Cascade Mini Ring