It's easy to use an aftermarket 5 hole sending unit in your 1935-1956 Ford car or truck that has a big 6 hole sending unit with our adapter. Our high quality machined T6061 Billet Aluminum Ford Fuel Tank Adapter adapts the 6-hole pattern from '36-'56 Ford fuel tanks to the aftermarket 5-hole pattern. Comes with all hardware.  + Outside Dimensions 3-1/4 Round + Inside Dimensions 1-5/8 + 3/8 thick + Aluminum + Hardware included