... ~108MHz, Demountable, Vertical or Horizontal polarization, Stainless steel AISI 304, Directional pattern.Electrical DataFrequency range 87.5~108MHzImpedance 50ohmConnectors L27 female ... aluminiumRadome:fiberglass (Option)MountingWith special pipe clamps 50~110mm dia. Directional Dipole Antenna