porcelain fuse unit 1.30A/500V 2.Low price &High quality 3.Inner metal:copper/iron 4.Very convenient and safety to use H558 Porcelain fuse unit,fuse unit fuse unit fuse unit1,Product: porcelain fuse 2.Material: copper, iron,aluminium3.Enjoyed good guality and reasonable pricecurrent 30A voltage 500vmaterial copper,iron,aluminium