EcoPlus Eco Fixed Flow Submersible Pumps feature an oil-free full submersible motor with the option of in-line use (except for the Eco 100). They are driven by a high powered rare earth magnetic rotor with a non adjustable flow, as well as a ceramic shaft and bearing. This makes it super durable, while the strainer even protects the impeller from damage. They are Ideal for anything from fountains to hydroponic systems and quietly run for an enjoyable operation with a 120 volt cord. Each pump has an inside threaded fitting, and include inlet and outlet fittings.