Simple two wire design, gravity fed type pump, includes 100 micron in-line filter. Small universal design allows easy set-up and installation anywhere. Gravity fed type pump with simple two-wire self priming design. Works on 12 volt negative ground systems only. Includes 100 micron in-line filter. Please see part #12S for gasoline applications or part #12E for ethanol, methanol, E85 and race fuel applications.