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Adapter E27 / 2 X E27
E27 adapter for G4/MR16 G 5.3/bulbs - Matronics
G9 To E27 Adapter G9 to E26 Lamp Holder Converter Power Adapter Base Socket LED Light Bulb Extend Plug|Lamp Holder Converters| - AliExpress
Adapter E27 / E14
G9 TO E27 adapter Conversion socket High quality material fireproof material GU10 socket adapter Lamp holder|g9 to e27|gu10 socket adaptere27 adapter - AliExpress
MR16 Lamp socket adapter MR16 to E27 lamp base MR16 turn to E27 lamp holder turn to MR16 Lamp head converter G5.3 TO E27|Lamp Holder Converters| - AliExpress