This item comes with a 2, 4, or 6 inch rubber contact wheel on one end as well as an aluminum 2 inch idler on the other end with an 8 inch mild steel platen spanning between them. The chassis can tilt when attached to any accessory arm. You can remove the platen to have a slack section between your two wheels.

Contact Wheels are made by AmeriBrade in Southern California with American sourced aluminum and rubber.