Mirror / Pipe Antenna Mount With SO-239 Antenna Thread & 17ft Coax Cable w/PL-259 Stainless Steel Mirror type Bracket fit Horizontal or Vertical Mirror arms & similar Pipes up to 3/4 inch. For Antennas needing an SO-239 ("M" "PO") Style base thread. Includes 17 ft of Premium 95%tinned Shielded RG-58A/U Coaxial Cable w/ PL-259 Connector installed. Great for Amateur Ham radio antennas. Chrome Plated Brass UHF mount.