STERLING V4 Slim Submersible pumps are the best pumps for 4½" and 5"Dia bore wells. Depth range from 500 to 1000 feet. These pumps are available 2.0. HP and 3.0 HP both in single phase and three phase. V4 Slim submersible pumps having copper rotor and excellent design for more discharge of water and less power consumption. Most of the domestic consumers are happy with STERLING V4 Slim Submersible pumps because there is "Maintenance Free" and it having long life. No other company have these models.