One new old stock Borgo brand standard size engine piston (86mm bore), part number 66.6806.0.F.  This fits:

Fiat 128 SL Coupe from 1972 and later

Fiat 128 Sedan & Wagon from 1974 and later

Fiat X 1/9 from 1974 and later

**  for 1300cc & 1500cc engines **