BMW R1200GSA Triple Black Clip On/Off Pillion Seat Plate
It has been powder coated in black satin to match the Triple Black models. The powder coating has been done over the normal high quality stainless and not mild steel as most seem to use to save money.
It uses the same locking mechanism as the rear pillion seat so there is no further installation.
This is a very good alternative to the more permanent fitting of the standard plate and allows for quick removal of the plate itself. I use one myself when I go on tour.
It uses a machined spigot and 2 locating lugs as shown in the image for the stainless steel version.