... 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 is ...