New OEM Quarter Panel Inner Structure Rail  (see schemtic).  This mounts above the window area, the inner structure rail for the quarter panel.

Right passenger side (USA RH)

Fits: 2015-2023 Transit Van 1500 thru 3500, with 148" wheel base only, MEDIUM van roof type, and not extended passenger van.

I have a photo of the van measurents and type shown - the middle illustration in the photo.

OEM # BK3Z-61513A12-B in primer