MGC-602 Locking Fuel Cap - Ford F-250 Super Duty (11-20) F-150 (06-08) F-350 Super Duty (11-20) E-350 Super Duty (09-19) E-250 (09-14) E-150 (09-14), Mercury Grand Marquis (06-11)

Deters vandalism and fuel theft. Manufactured with OEM quality materials and safety standards by an OE Supplier. Manufactured to pass all state and federal emissions requirements. Specifically designed pressure and vacuum relief valves to prevent evaporation of fuel. A leaking fuel cap can allow up to 30 gallons of gasoline to evaporate over the period of a year.