Genuine Aprilia valve spring plate for '01-'03 Mille, Mille-R, '01-'04 Futura, '01-'06 Caponord, '02-'05 Tuono, '06-'08 Tuono, and '04-'08 RSVR.
Aprilia part no. 0253956 (ex 0253955)
Part no. 21 in the diagram