This will vary depending on the specific model you have. The CTR Phase II Hard Mount models feature two M4 threads 1.5” apart on the end caps that can be mounted directly to holes in a case wall or other panel. They can also be used attached to one of the many models of mounting brackets we carry. We have bracket options for standing them upright, fan mounts, and radiator mounts. Low Profile models use a special tube clamp with the same M4 threads 1.5” apart for the mounting holes. 1-2 are included depending on the exact model.