500 ft Spool 400 Series Ultra Low Loss Coax Cable for RF/CB Applications CA400 Comparable to Times Microwave, Shireen, Andrew, and Wilson 400 Series Ultra Low Loss Coaxial Cable. Connects amplifier to splitters, taps, indoor and outdoor antennas, and other passive components. Attenuates signal less then .1 dB with 50 Ohm impedence. Ultra low loss characteristics ensure the maximum performance of your installation. Shipped on wooden spool, use it for your custom installations.