Oring for fuel tank pressure regulator fitting, some petcock fuel valve flanges, and some fuel level sensors. Models listed below from 1997 to 2002. Used for the petcock mounting flange on V11 Sport, V11 LeMans, Scura, Tenni, QuotaES 1100, Centauro. Used for the fuel pressure regulator mounting flange on V11 LeMans, Scura, Tenni and Centauro. Used for the fuel level sensor flange on Quota ES 1100 and V11 Sport.