Hallmark Industries MA0343X-4A Deep Well Submersible Pump, 1/2 hp, 230V, 60 Hz, 25 GPM, 150' Head, Stainless Steel, 4" Pump, Deep Well Submersible Pump, 1/2HP, 230V 60HZ, 25 Gpm, Stainless Steel, for 4" or bigger well, long life 2 wire pump with built in control box- DOES NOT require external control box; Industrial grade heavy duty, good for home usage; Built in thermal protection American company