What are the measurements for 9030W?

Product Description: 1971-73 Mustang MACH 1; Pop Open Fuel Cap

Measurements:

Base: 5-3/8" O.D. & 2-1/4" I.D. & 3-1/4" Mounting Holes Apart

9030W_std

For more information, follow the link: 1971-73 Mustang MACH 1; Pop Open Fuel Cap