5-30 GPM MECHANICAL FUEL METER Brand new, GPI model MR-5-30-G6N mechanical fuel meter for measuring in gallons both batch and cumulative totals. Use on pump flow systems only. Designed for use with gasoline (up to 15% alcohol blends such as E15), diesel fuel (up to 20% biodiesel blends such as B20) and kerosene. Features include aluminum housing, nutating disc meter design, four digit resettable batch display, seven digit cumulative display, field adjustable fuel calibration, and 90 degree inlet/outlet port rotation adapters. Calibrated at the factory for diesel fuel use.