Tram 8XF-G RG8X Tramflex Precision Double-Shield RF Coax Cable with Gray Jacket, 500 FeetTram 8XF G RG8X Tramflex Precision Double Shield RF Coax Cable with Gray Jacket, 500 Feet Low loss premium double shield RG8X coaxial cable; Bare copper braid 95% + aluminum foil shield; Stranded bare copper center conductor, 19 29 gauge (. 011 in.); . 155 polyethylene foam insulation ; 78% velocity ; 25. 9 pF ft. capacitance; . 242 in. gray PVC jacket ; 50 ohms; 500 ft.;