This cable management bar has 5 rings. The rings at both ends can either be be mounted horizontally like the other rings or they can be rotated 90 degrees for vertical wire management.
The height is 2 rack units tall, 3.5". The rings are plastic, the bar is metal and all parts are black.
Each of the 5 rings has the same inside dimensions, these are 2 1/4", height, and 2 1/8", depth for maximum cable capacity.
For mounting hardware:Click here.