Product description: 1967-71 Dodge/Plymouth A-Body Fuel Cap-Chrome
The outside diameter of the top of the fuel cap is 3 and 1/4 inches. The outside diameter of the ring on the underside of the cap that fits within the fuel filler neck is 1 and 3/8 inches. Please see the two photos below for clarification.
For more product information, follow the link: 1967-71 Dodge/Plymouth A-Body Fuel Cap-Chrome