... E27,E40,B22,E14,E17,E12,E26,E392)Material: ceramic/porcelain/Steatite, High-frequency porcelain3)Certificates: CE/ROHS4 ... Directive 2002/95/ECStyleEdison screw lamp socketBody materialPorcelain/ceramic/Steatite porcelain/glazedMetal materialScrew shellAluminum plated copper Copper/ ... , welcome to visit our factoryWe have been manufacturing electrical ceramic for many years now. At present we are ...