High quality Metal Raschig Ring Materials: SS304 316 316L 410... Size: 15mm~90mm SS304, SS304L,SS316,SS316L,carbon steel Metal rasching ring is ... heat resistant, high free volume, high capacity, low resistance, high separation efficiency and so on. It is especially suitable for rectification towers under ... steel, stainless steel including 304, 304L, 410,316, 316L. High quality Metal Raschig Ring