porcelain lamp holder 1. Series:E27 2. Voltage:250v 3. Certification:CE porcelain lamp socket,screw lampholder, lamp base1. Series: ... E27, E26, E40, E14, B222. Certification: CE, LVD, ROHS3. Inserted metal: according to buyer's choiceA ... holder. "The best quality, the best price" is our operation principle. Moreover, all products we sell have obtained the certification ...