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 Drive: Spline Drive, Height: 2-9/16", Width: 2", Shaft Dia: 5/8"