Attributes . 1. Industry Standard for Rotary Pumps, These are By Far the Heaviest Duty, Ideal for Tough Outdoor Use in Extreme Weather Conditions, 2. Solid Cast Iron Construction, Fully CNC Machined to Close Tolerances, 3. Graphite Vanes are Self-Lubricating and Non-Wearing, 4. High Quality Graphite Seals Allows the Pump to be Used with a Wide Variety of Fluids, Including Diesel with up to 15% Ethanol Blend . Names