The 3 ft Comprehensive High Definition 3G-SDI BNC to BNC Cable is a broadcast quality RG6 coax cable that supports SD and HD signals and up to 3Gbps transfer rates. The center conductor is 18 AWG and made of solid, oxygen-free copper. A mix of tinned copper braid and aluminum Mylar provide a 100% shield. 75 ohm nickel over brass connectors afford proper impedance and minimal signal reflection.