What is this?G4 lamp fixtures are common accessories and parts used on the G4 bulb socket. Widely used on crystal lamps and halogen lamps.What will I get?Product Name: G4 lamp fixturesMaterial: MetalThread Size: M10*1mmFit for Bulb Socket Size: G4 Bulb SocketFit for G4 Bulb Diameter: 6mm / 0.24"Total Size: 29x11.5mm / 1.14x0.45 inch (Length*Max Diameter)Package Content: 5 Set x G4 Lamp Hardware FixturesAre there any advantages of the product?Metal material, durable to use. Hollow design, the wires connect to bulb socket can pass through it easily.M10 Thread can provide a firm and tight connectionHow to use it?Easy to use, plug the bulb socket into sockets directly, no need for using other tools.What should  I notice?Please note that G4 bulb socket is not included here. You need to the G4 bulb socket yourself.