This is very high quality shielded 75 ohm cable made by Gore. This is a very high speed cable with the Velocity of Propagation at 79 % of air making it a great cable for use as a digital audio cable. It is Gore part number CXN 3073. This is silver plated copper wire with PTFE insulation. This has a dual shield, one is a silver plated copper braid over a layer of black conductive PTFE. The specs are,

Impedance 72 ohms + or - 7 ohms

Capacitance  17 pf / ft

Velocity of Propagation  79 % of air

Center conductor resistance 0.166 ohms / ft

Operating Temperature -55C to 200C  

The cable makeup is,

center conductor: 32AWG silver plated copper with 7/40 strands

Dielectric: ePTEE Composite

LN Layer: Conductive PTFE

Shield: 38 AWG silver plated copper braid

Jacket .009 inch Blue PTFE 0.0790 inch (2.01mm)

This is a 25 foot length of wire. If you buy more than one I will ship it as a continuous length.