... Metal Pall Ring 2) size: 16mm,25mm,38mm,50mm etc 3) iso 9001:2008 4) SS304, SS304L,SS316,SS316L,carbon steel. Metal ... Pall Ring is made of material like carbon steel, stainless steel or Aluminum alloy, etc. The ... wall thicknesses are available on request. Material available: carbon steel, stainless steel including 304, 304L, 410,316, 316L. Metal Pall ...