This RG8X 200 ft. roll of Tramflex 50 ohm coaxial cable from Tram provides a long run of cable needed for those larger jobs. It comes on a wood reel to help run cable more quickly and efficiently. The low-profile Black PVC jacket will fit in most settings with ease. This 50 ohm coax cable is 95% bare copper braid with 78% VOP (Velocity of Propagation). The center conductor is stranded bare copper 19/29 gauge (0.111 in.) while the foam polyethylene insulation is 0.155 in. (3.94 mm).