... 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 ... with a stream control valve set in the pump, the stream can be adjusted at will. 5 ... sizes.applicable scope: suitable for water-pumping, water-circulation, water crude-filter of various aquariums and seafood ...