Of all the components that make up this F-2 Meter the O,ring 7.8x2.5 has the lowest price. Parts such as the F-2 Meter: Cable Inner, Stay,speedometer, O-ring,7.8x2.4, O,ring 7.8x2.5 are included in the Tlm50 1985 (f) F-2 Meter parts fiche.
