... Ring Application: Vacuum rectifying towers Size: 5/8", 1", 1.5", 2", 3", 4" Size customized Metal Pall Ring:Carbon Steel pall ring ... , CS pall ring, Carbon Steel pall ring, Stainless steel pall ring, SS304 pall ring, SS304L pall ring, SS316 pall ring, SS316L pall ring, SS410 pall ring.Metal Pall ring ... 350.965/.95550/531200370/371 Carbon Steel, Stainless steel Metal Pall Ring