... /8", 1", 1.5", 2", 3", 4" Application: Use as tower packing Size customized Metal pall ring is an industry standard ... transfer efficiency increased by 30%.Material: Stainless steel, carbon steel, aluminum, bronze, 304L, 316L, and other alloy.Technical data of metal ... .9655012003704 "100×100×2.0350.955531200371 Metal pall ring for tower packing