... XINTAO Metal Raschig Ring Introduction: Metal rasching ring is made of materi als like carbon steel, stainless steel or Aluminum alloy, etc ... under vacuum to treat thermosensitive, decomposable, polymerizable or cokable systems, so it is widely used in ... reference to material stainless steel (AISI304) in the material thickness shown. Material available:carbon steel, stainless steel including 304, 304L ...