driven by the permanent-magnet in-phase motor, this pump is high-efficiency, energy-saving and durable. feature: 1.driven by the permanent-magnet in-phase motor, this pump is high-efficiency, energy-saving and durable. 2. made of stainless steel, the shaft of the pump can endures abrasion and corrupt, and can be used in freshwater and seawater. 3. the motor is sealed in the body shell with resin. ...