Larsen - 0-6 GHz 3/4" Hole Mount Antenna with FME Female Connector Installed UD Coax is Dual Shield Solid Center RG58/U CX Coax is Single Shield Stranded Center RG58A/U DS Coax is Dual Shield Stranded Center RG58A/U Fully weatherized cable interface and a center pin that removes to convert it from a standard to a high frequency mount.