Copper wire. Ceramic and graphite mechanical seal. High efficiency induction motor of suirable size. Quite running. Close and externally ventilated,suitable for continuous duty. Thermal cutout relay(motor protector)is incorporated in single phase motors. ModelPower(kw)Flow(m3/h)Head(m)Inlet/Outlet(inch)JET-150-1.51.54601JET-1.5-1.81.84601Other models and sizes are available as you neeed