【Wide Application】 compatible with all CB radio antennas and any rack with 3/4 inch and 3/8 inch mounting holes. It is widely used in all Midland MicroMobile Antenna, Yaesu / Vertex /Kenwood / Icom radio, any needs an NMO HF/UHF/VHF/CB Antenna. 【NMO Antenna Base Cap】Antenna rain base effectively protects the unused NMO antenna in all environments. The design of O ring seal in the base to keep water out. Especially removing the antenna when washing your car, the NMO rain cap protect the NMO base to prevent rust. 【RG58 Coaxial Cable】The RG58 flexible Low Loss coaxial cable is NMO to PL259,The connection diameter at the end of the NMO antenna is about 28mm and the entire cable is about 16 feet long. 【Easy to Install】The end of the NMO connector is at a 90 degree right angle and features a detachable design, making it perfect for installing your mobile two-way radio antenna in narrow areas such as the vehicle luggage rack, engine compartment cover, and trunk. Simply drill a small hole (usually 3/4"to 3/8") on the surface of the base and connect the NMO antenna to the radio to use it 【Ultra High Quality】The PL259 male connector cable is designed with copper inner conductor, PE jacket, pure copper shielding layer, and PVC sheath. Which could reduces the loss of signal transmission, and the high-quality PVC outer sheath can be used normally in harsh outdoor environments.