3 Pieces x PowerPac E40 to E27 LED Bulb Base Adapter Universal Light C - PowerPacSG
White porcelain lamp holder Edison E40
Lamp holder E40 to E27 Lamp Holder Converter LED Adapter Socket Light Bulb Lamp Holder Adapter Plug Extender Led Light - Amazon.com
Source Porcelain Lamp Socket E40 bulb holder for Argentina/Brazil on m.alibaba.com
BRASS E40 BULB HOLDER CERAMIC BASE | Home Furnishings | DYKE & DEAN
E26/E27 to E39/E40 Light Sockets Adapter, Light Bulb Socket, Bulb Base Adapter, Converters Lamp Holder, Converts E39 Pin Base Fixture to E26/E27 Standard Screw-in Socket (Pack of 10) - Amazon.com