Fermaluce Black metal, with E26 threaded lamp holder, the metal wall or ceiling light source
E27 Light Bulb Holder Base Fitting ES Edison Screw Cap Socket White Lamp Fixing. | eBay
B22 to E27 Socket Adapter, Bayonet BC Cap B22 To E27 ES Edison Screw Converter, BC to ES Extend Lamp Holder Base, B22 to E27 Adaptor Holder Fitting 0-250V, 2A Lamp Socket