lamp holder,porcelain lampbase,ceramic lampsocket 1)E27,E40,E26,E14,B22 ,E39 2)CE/LVD/ROHS 3)Metal:Copper/Iron/Aluminiu E10 12 14 17 26 27 39 40 porcelain lamp holderCertificationCE//ROHS/LVDStyleEdison screw lamp holderBody materialPorcelain/ceramic; body can be matt or glazedMetal materialScrew shellAluminium plated copperCopper/brassContactorIron plated copperCopper/brassStain steelTerminal/ ...