Manufacturer of Metal Rasching Ring; Material:SS 304 304L 316 316L 410 etc Size ... 80mm 90mm XINTAO Metal Raschig Ring Introduction: Metal rasching ring is made of materi als like carbon steel, stainless steel or Aluminum alloy, etc. ... above data is reference to material stainless steel (AISI304) in the material thickness shown. Material available:carbon steel, stainless steel including 304, 304L, 410, ...