Tinned copper material High corrosion and oxidation resistance.The power supply is stable and durable without affecting the fan performance.4Pin interface Compatible with 3Pin interface.3mm thick double-sided tape with hollow design can perfectly bond the surface of the chassis without falling off.Made of high-quality materials, it is not easy to age and has a long service life.Product name: computer fan hubNumber of extensions: 5Wire model: 1007 22AWGWire outer diameter: OD1.4mm*4Product interface: 4Pin interfaceWire length: 40CMColour:blackMaterial:PVC+tinned coppertype:1 to 4 PWM Fan HUBPackage Contents:5 x Fan HubOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.