Wilson 15" Coaxial Cable Extension for Wsn301101 and Wsn301103 is a RG58U type 10 feet with FME male to FME female connectors. This cable is versatile which is designed to be used for cable lengths up to 20 feet. It is most commonly used for in-vehicle repeater kits and the connectors are designed so that the cable can go between mobile amplifier and mobile antenna. Although this antenna is slightly higher the difference over 20 feet lengths is very small. For cable lengths longer than 20 feet you will need LMR-400 coaxial cable. This cable has N-male terminated ends, designed for our residential amplifiers. If are using it with a mobile or vehicle amplifier, cable connectors might be needed.