4" Submersible Borehole Pump SP3A-52N 4 kW 2950 Rpm, 380-400-415V 3 Phase 50Hz, Materials: Casing 316 Stainless Steel, Impeller 316 Stainless Steel, Shaft Seal: Ceramic vs Tungsten Carbide, Elastomers: NBR, Discharge Connection: Rp11/4" Female Thread