The 8240-BLK-U1000 from BELDEN is 20 AWG RG-58A coaxial cable with solid .033" bare copper conductor, polyethylene insulation, tinned copper braid shield (95% coverage) and PVC jacket. This cable has 52 Ohms impedance and comes in reel of 1000.0' (304.80m). Operating temperature range is from -40°C to 75°C.