... ,304L,410,316,316L Size:16mm, 25mm, 38mm, 50mm, 76mm Metal Pall RingMetal Pall Ring is made of materials like carbonsteel,stainless steel or Aluminum ... vacuum to treat thermosensitive,decomposable,polymerizable or cokable systems,for these,Pingxiang Petrochemical metal tower packing is widely used in packing towers ... :Carbon steel,stainless steel including 304,304L,410,316,316L Metal Pall Ring