Certification:ISO9001,CCC,CQC,CE, External Size:vast range of sizes Standards:national standards and IEC standards connection box Place of Origin:ChinaCertification:ISO9001,CCC,CQC,CE,External Size:vast range of sizesStandards:national standards and IEC standardsMaterial: steel, sheet steel,stainles.Packaging & Delivery Packaging Detail:1pc/ctnDelivery Detail:30 days connection box