I saw a new Harley the other day and it doesn't have the cover that covers the dust seal at the top of the fork slider.
The Iron was the only Sportster I know of that had those IMO stupid looking fork gaiters on them. If I had ever bought an Iron those would be the FIRST thing that was stripped off the bike.
I don't know what type of plastic/rubber Harley used to make them but, they always turn a greenish shade after being in the Sun. ArmorAll will return them to black, but it doesn't last long.
I think he means the chrome caps that press onto the fork sliders.
I too am not a fan of the gaiters. More a dirt bike kind of thing.
As far as I know, the Iron didn't come with caps of any kind on the sliders, just the exposed rubber seals. I know my son's '17 didn't, just had the gaiters