Belden - Belden 8214 RG8-Type Coax Cable
The Belden 8214 RG8/U coaxial cable (black) has a stranded center conductor for greater flexibility. This 3/8 inch 50 Ohm coax cable uses a 97 percent braided shield for coverage and foam polyethylene dielectric for insulations.
The Belden RG8-type cable requires 9913 connectors because of .108 stranded center.
The coaxial cable is available in bulk and is priced per foot.