Source E40 ceramic light bulb socket with metal cap for Argentina on m.alibaba.com
Thicken Mining Cap Lamp Holder Outdoor Waterproof E27 Screw Light Holder E40 Die Casting Ceramic Lamp Holder With Lampshade From Breadstorygroup168, $3.22 | DHgate.Com
E40 GES Porcelain lamp holders
Porcelain E40 lamp holder kit
Lighting Accessories E40 Ceramic Lamp Base / Light Holder Socket 5PCS _ - AliExpress Mobile
Adjustawings E40 Lamp Holder USA Cable - Available for All Models
Source Metal halide lamp industrial mining lamp Base socket E40 ceramic lamp holder on m.alibaba.com
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