1956 - 1956 Ford F-250 Rear Window Weatherstrip Seal, With Trim Groove For Steel Trim. This rear window fits the wrap around rear window. This application goes first on the glass and is installed using the rope-in method. The trim groove requires you to re-use your chrome trim. Made from ozone resistant EPDM rubber and from the same OE specs as the original for an authentic fit and finish.