Product: Goulds Three Phase (230/3/60 and 460/3/60) 1.5 HP 3500 RPM Pump. Model Number: 2ST1G2PPR2 Formerly: 2ST1F2D4 , 2ST1F2DPR1, 2ST1F2GPR2, 2ST1F2PPR2 Replaces: Impeller Diameter: 4.5"