This is a 3m BNC (male) to BNC (male) black coaxial simplex PVC copper patch cable. A coaxial cable is used for carrying lower-frequency signals in which the dimensions of the cable are controlled to give the precise constant conductor spacing which is needed for it to function efficiently as a transmission line. This PVC jacketed cable is best suited for LANs or SANs and is recommended for connection between fiber patch panels hubs switches media converters and routers. A simplex cable is a single strand of fiber that works best with bi-directional transceivers as well as other single-transmitting devices. Our patch cables are 100% compliant for all of your networking needs. Our products are guaranteed by federal law to not affect or void OEM warranties.