The 6580-00144, also referred to as the 6580-144, from Rochester Gauges is a senior, fixed length model designed to fit the original fuel tank on many vintage 21' MAKO boats. This gauge is manufactured for us by special order and it comes as it was originally designed along with (4) 1⁄4"-28 x 9⁄16" mounting bolts and a Buna-N gasket. The original aluminum bezel dial, P/N 5002S00062 aka Dial No. 5-62, is available separately, or as a different variation of this part from the drop-down menu. In addition to the available direct-read dial we also offer a TwinSite sender dial that allows the captain to read the fuel level at the tank while also sending the fuel level signal to a remote instrument on the dashboard.