Kelch 7J203657 Gauged Golf Cart Gas Cap for Ezgo Columbia Some Harleys This Newest Style Kelch Gas Cap Will Work On Most EZGO Marathon Models, Columbia, And Some Harleys Its Critical To Know Your Tank Depth Before Ordering, As This Gas Cap Does Not Fit All Models. You Will Need At Least 12 1/2" Of Tank Depth For This Gas Cap To Work. These Gas Caps Fit A 2 1/4" Diameter Threaded filler Neck Kelch Gas Caps Are Made Proudly In The U.S.A.