HEAVY DUTY double-shielded cable. Note: due to the shielding and the lower-gauge wire than most Ethernet cable, this cable will only work with termination intended for 22AWG cable. May not fit through very small spaces set up for most other cables. I'm sure it will work just fine with very high-bandwidth signals. One oddity: the "striped" wires of every color are almost entirely just white, so you need to be extra careful to keep them in order when installing termination.