Viton Recommended when pumping hydrocarbons, solvents and severely corrosive chemicals. Specifications Impeller material: Viton Insert material: Plastic epoxy Drive type: Double flat Temperature range: 60 degree F (15.6 degree C) to 180 degree F (82.2 degree C) Number of blades: 10 Diameter: 2 1/4″ (57.1 mm) Width: 1 1/4″ (31.7 mm) Shaft diameter: 5/8″ (15.8 mm) Weight: 0.08 kg