With the patented InSITE feature, field termination of blind entry single piece BNC compression connectors is simpler, faster and now provides a higher performance connection for all applications from CCTV to HD Video. The InSITE window is a 360 degree clear window which allows the installer to verify that the prepped cable has been inserted far enough into the connector to make contact with the fixed pin-before the connector is compressed. Terminate BNC's with confidence and avoid costly re-terminations and troubleshooting during installtions. For RG-59 coax, with a center conductor range: 23-18 AWG Solid, dielectric diameter range 0.142 in. to 0.148 in., outer jacket diameter range 0.230 in. to 0.250 in. Gold-plated fixed pin and pin contact area won’t come lose or pop out of the connector Moisture-inhibiting cable entry design with corrosion-resistance nickel-plated brass construction Funneled pin entry - centers angled pins, reduces pin collapsing Smoother and easier mating with sockets through increased BNC head travel range 75-Ohm nominal impedance, frequency range: 0 MHz to 3 GHz Requires an industry standard 1/4 in. x 1/4 in. cable preparation Return loss performance: >35dB up to 1 GHz, >25dB up to 2 GHz, >20dB up to 3 GHz