What is this?Good lamp hardware for socket extension. Widely used for replacing, repairing pendant light in home and office, or making other DIY lamp projects.What will I get?Product Name: Lamp PipeColor: Silver ToneMaterial: Galvanized IronThread Size: 1/8 IP (1/8-27)Overall Length: 16cm(6.3")Inner Diameter(Approx): 7mm(1/4")Outer Diameter(Approx): 9.6mm(3/8")Package Content: 15 x Lamp RodAre there any advantages of the product?Made of iron material, zinc coated, with good strength and rust resistance.The lamp rod has a hollow center to allow the lamp cord or wire to run through it.How to use it?All thread design, easy to screw into threaded nuts or tapped holes.What should  I notice?Please check the thread size before buying to make sure it will fit your project.