4" diameter stainless steel pump, motor shell, and drive shaft. Quiet and economical operation. Submersible pumps are rated on the average number of gallons delivered per minute to the well head from various water level depths. Models rated at 10 GPM are for the average residential size home and family. Manufactured by Flint & Walling, all Star pumps use the contractor recognized water lubricated Franklin motor. Cast-iron discharge, lightening protection. Easy heat-shrink splice kits included in package along with illustrated installation instructions. 1-1/4" cast-iron discharge. All 3 wire submersible well pumps require a Franklin control box for operation, if your customer does not already have an existing control box: For SKU 429589 1/2 HP use SKU 429554. For SKU 429570 3/4 HP use SKU 429562. For SKU 434302 1 HP use SKU 434310. 1 year limited warranty.