20M Extension Cables SMA Male to Female Coaxial Extension Cable WiFi Router Antenna Aerial Copper PPure Superior Quality.20M Wireless antenna extension cables.Perfect solution to positioning your antenna for the best signal without moving your computer or router.Suitable for use with most routers, access points and wireless cards or dongles where the existing antenna can be unscrewed.Product name: 20M SMA Male to Female Wireless Antenna Extension CablesCable: RG174Resistance: 50 ohmsColour:blackMaterial:copperSize:20mPackage Contents:1 x 20M SMA Male to Female Wireless Antenna Extension CablesOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.