This is the seat plate required if you want to convert from a Biposta seat unit to a Monoposta seat unit. It is no longer available from Ducati. Also included, a Lock Spigot Bracket with 2 Rubber Buffers, Mono seat pad nuts (4) and washers (4) and the hinge bracket and screws (2). Not entirely sure if I have the 2 spacers that go with the bracket but I'll include them IF I find them £50 posted to a UK mainland post code. Andy