Note:The higher in frequency and the longer of the length, then the greater of the attenuation. Please pick the length according to your usage.Description:RG-58 Pure Copper Coaxial Cable Low Loss for Wi-Fi Router, PCI Card, Access Point. Ultra Low Loss Extension Cable for antenna, Made from low attenuation RG58 Cables. Specification:Type: SMA Male to SMA FemaleImpedance: 50 ohmCable length: 50 feetCable diameter: 0.16 inch Package Includes:1 x SMA Male to SMA Female Coaxial Cable