The Fleck FL60306 Metered Timer Assembly Includes 120 volt Timer Motor and wiring harness with a Meter Gallons range from 0 - 21 (0 - 2100 Gallons).
It is commonly used onFleck 1500, 2500, 2510, 2750 & 2800 Drive Assembies.
Other Meters are available for commercial applications that have require higher gallons on the MEter Dial.
These Meters are special order (7-10 Day Lead Time) and would be used on applications requiring a 3/4" Extended Meter.... or 1" , 1.5" , 2" and 3" Meter Sizes.