The towers, rings, and lower mounts are all made from 3/16" HRPO steel and include all hardware required to bolt up to your truck.
We can customize the tower height and mounting width if needed, however there will be an extra charge for this service. Please call or email us for more info. As the towers are made now, it's 7" from the bottom of the tower to the center of the bolt hole.
We do not sell the lower mounts by themselves, this is a complete set.