Globe/Barco Impellers Economical impellers. Sturdy, will live if run dry for 15 minutes. When selecting your impeller, be sure to check: 1)Drive Type, 2) Number of Blades, 3)Height, 4)Width, 5) Shaft Diameter Brand: Caterpillar, Drive: Ding Drive Keyway, Height: 2-1/4", Width: 1-1/4"