VTF - VIDEO TRIAX CABLE Flexible
VTF8.5 and VTF11.2 are triax cables, physically similar to the standard type (they use the same series connectors), but have detail differences to improve flexibility. The centre conductor is stranded, rather than solid, and the lower cross-sectional area of copper in VTF11.2 produces a slightly higher signal attenuation than VTS.
Full Description (PDF)