These optional fuel tank senders mount with five mounting screws. They work on fuel tanks from 6 to 24 inches deep by cutting to length using the instructions included. Since fuel tank senders only read resistance to ground they work on all 6-24 volt systems positive or negative ground. They do not have a fuel pickup tube built into them as some original senders may have. Made with a high quality ceramic board rheostat. These fuel senders are available for the following applications: Application Listing: SW - SW gauges - 240-33 Ohms VDO - VDO gauges - 10-180 Ohms GME - GM up to 1964 - 0-30 Ohms GML - GM 1965 and up - 0-90 Ohms ORG - Early Ford & Mopar - 73-10 Ohms FDL - Ford 1987 and Up - 16-158 Ohms The first number of the (Ohms) represents empty and the following is for full.