... years producing experience of manufacturing metal rings 20 days delivery reply within 12 hours ISO9001,SGS PXZT metal rings including cascade ring, pall ... aluminum alloy2) Main types: pall ring, hypack, raschig rings, saddles, cascade mini rings, etc.3) Thin4) Heat resistant5) Big flow6) ... 5×0.41230.972358001818350×29×0.5790.97212133141 metal rings (pall ring, rashing ring, cascade ring, conjugate ring ...