... E40 porcelain lamp holder 2) certificate: CE,ROHS 3) factory direct price 4) fittings:copper, aluminum,iron or zinc alloy ... E40 porcelain lamp holder, porcelain lampholder, lamp base, lamp ... main materialHigh pressure & ceramic, common ceramic, porcelain5) metalCopper, iron, aluminum6) sizeAs your requested7) available wire0.75mm2 ; 0.55 ...