This trim can be used on the lower seam flange, where the body side mates with the sill (rocker) panel flange. It is a black plastic alternative to the more common chrome trim, but shares the same profile as the popular GZF0105A deluxe chrome trim. Sold by the meter, since the most common installation is to span from front and rear fender flares. It should be straightened out by hanging to remove the tendency to curl. A heat gun will help with installation.
See also CZH4316 for a straight length of this trim to span from front to rear wheel arch flare.