The coaxial cable in between is RG-58C type, which is a widely used coax variety with a black, non-contaminating PVC jacket for additional physical protection.
Attached to each end of the assembly is a female type N bulkhead (panel mount) style jack with a nickel-plated brass body and a gold-plated contact..RG-58C Coax Cbl Assmbly w/N-Type (Female ) to N-Type (Female ) Cnnctrs, 50 Ohm Impedance, 50FT Lnth These include many military & civil radio frequency (RF) operations such as cable television (CATV/MATV), telecommunications, WiFi/network antennas, laboratory benches, and ham/CB/other radio setups, as well as any other signal transfer applications in fields such as aerospace, scientific, and medical.