... 4) fittings:copper, aluminum,iron or zinc alloy E40 porcelain lamp holder, porcelain lampholder, lamp base, lamp socket(FOR AUSTRALIA MARKET)1 ... )product name Porcelain lampholder XY547B-1 E392) certificateCE, ROHS.3) voltage250V-750VElectric current4A-16A4)main materialHigh pressure & ceramic, common ceramic, porcelain5) metalCopper ...