Fill-Rites line of 3-wheel and 4-wheel mechanical flow meters are designed to meet the stringent demands of customers who need to monitor fuel usage accurately and dependably.Rugged construction,easy to read numbers,and......Fill-Rites line of 3-wheel and 4-wheel mechanical flow meters are designed to meet the stringent demands of customers who need to monitor fuel usage accurately and dependably.Rugged construction,easy to read numbers,and the flexibility of horizontal or vertical positioning are just three features of these superior meters.Plus,all can be field calibrated for the utmost accuracy.