Check the listing for details. 1/4-18 Thread Lamp Pipe Nipple Kit Fasteners Hardware for Chandelier 3 Size. Condition: New. Listed at 12.11 USD. This DC Power Cable is good for CCTV installers, DIY enthusiasts, and professionals who need to repair or extend the power supply for their security cameras, LED strip lights, or other low-voltage devices. It can be used in both residential and commercial settings.SpecificationMaterial: IronSurface Treatment: Zinc PlatingThread Size: 1/4-18Lamp Pipe Inner Dia: 8.5mm / 0.33"Lamp Pipe Outer Dia: 12.8mm / 0.5"Lamp Pipe Length: 20/40/50mm / 0.79"/1.58"/1.97"Packing List: 3 x Lamp Pipe (3 Size Included)Advantage Made of steel materials, this Lamp Pipe Nipple Kit is durable and long-lasting. The all-threaded design makes it easy to install and use, and the assortment of sizes ensures that you have the right length for any project. Also, the threaded lamp pipe has a hollow center which allow wire to pass through.