This is the nylon roller that fits on the end of the window regulator arms. Includes rivet.
2 rollers required per window, 4 rollers required per car.
Replaces Ford part number C5AZ-5726232.
Dimensions: 11/16" Diameter
Here's an instructional video on how to install the rollers. Keep in mind that this is a YouTube video from Danchuk Manufacturing installing a different type roller, but the technique is the same: