Product: Aluminum Side Shoulder Support Compatibility: Customizes any standard non-containment KIRKEY seat by adding a Shoulder Support Purpose: Increases side support to the shoulder during heavy cornering and in the event of a side impact Installation: Easily installed on any non-containment KIRKEY seat Material: Made from the same grade of aluminum as the seat Customization: Available in any of the standard fabrics and colors listed with each seat Cover: Sold separately Ordering: Substitute the last two numbers in the support part number with the appropriate fabric and color number