250 GPH Oil free mag-drive pump For use in reservoirs and fish safe for aquariums; no harmfull substances to leak 1/2 inch NPT threaded input and outlet ports Only one moving part - no motor seals to wear out or leak Submersible or Inline use 50% more energy efficient than conventional pumps Directional flow outlet can be used in any orientation Sponge pre-filter prevents pump from clogging