Metal Pall Ring 1.material: SS316, SS304, SS304L, etc 2 size:16mm,25mm,38mm, ... .450*50*0.9365650010995.476*76*0.820518306997.490*90*1.022911606297.1 The above data is reference to material stainless steel ... steel including 304, 304L, 410,316, 316L. YIQUAN metal pall ring for petrochemical industry