... 1/2''-72'' Type:SO,WNF,LJF,SWF stainless steel blind flanges ,all sizes blind flangesNameFlangeSize1/2" to 48" DN15 ... ISO, JIS, DIN, GB, SH, AND HG etcMaterialcarbon steel, stainless steel & alloy steelPriceVery competitiveQualityFirst gradeCertificateISO9001:2000, API ,BV ,CEOther ... painting3.All the process are made under the ISO9001:2000 and API strictly . stainless steel blind flanges ,all sizes ...