Material: Stainless steel, carbon steel Size: 5/8", 1", 1.5", 2", 3", ... a wide range of materials, such as Stainless steel, carbon steel, aluminum, bronze and other alloy.Metal Pall Ring ... temperature applications, mechanically robust, lesser probability of breakage, suitable for deeper beds.Technical data of metal pall ring: Diameter ( ... /350.965/.95550/531200370/371 Metal pall ring for water treatment